commit 9491dafcca56175ff750522c8712ab11daa2daad
Author: Sunil Thakares <sunil@thakares.com>
Date:   Sat May 24 23:07:23 2025 +0530

    Initial commit: all files from local directory

diff --git a/Algorithm-Flowchart.md b/Algorithm-Flowchart.md
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+
+# DNS Server Algorithm & Flowchart
+
+This document outlines the algorithm and flowchart for a DNS server implementation compliant with RFC 1035 (DNS) and RFC 4034 (DNSSEC).
+
+---
+
+## ✅ Server Algorithm
+
+### 1. Server Initialization
+
+1. Load configuration from environment variables.
+2. Initialize the logging system.
+3. Create SQLite database connection and initialize schema.
+4. Initialize cache with NS records.
+5. Start periodic cache cleanup task (every 5 minutes).
+6. Bind and listen on UDP and TCP sockets.
+
+### 2. Query Handling Flow
+
+#### Upon Receiving a DNS Query:
+
+1. Validate DNS query packet.
+2. Parse header and extract domain name and query type.
+3. If query type is `DNSKEY` or `DS`, return signed records.
+4. Check DNS cache:
+    - If **hit**, build and return response.
+    - If **miss**, lookup in database:
+        - If found, respond and cache it.
+        - If not found:
+            - If authoritative, return `NXDOMAIN`.
+            - Else, forward to upstream resolvers.
+5. Add DNSSEC signatures if applicable.
+6. Send response to the client.
+
+### 3. DNSSEC Signing Process
+
+1. Load DNSSEC key from configured file.
+2. For each relevant record:
+    - Generate `RRSIG`.
+    - Encode signature (Base64).
+    - Calculate key tag and signature expiration.
+3. Add `RRSIG` to the answer section.
+4. Include `DNSKEY` in the authority section if needed.
+
+### 4. Response Generation Logic
+
+1. Construct response header:
+    - Set QR flag and response code.
+    - Include Authoritative Answer (AA) if authoritative.
+2. Attach original question section.
+3. Populate:
+    - **Answer** section: with resolved records.
+    - **Authority** section: with NS and DS records.
+    - **Additional** section: with glue records, DNSKEY if required.
+
+---
+
+## 📊 Flowchart
+![Flowchart](flow-chart.png)
+Below is the visual representation of the DNS query handling logic:
+
+```
+
++---------------------+
+|   Start DNS Server  |
++---------------------+
+           |
+           v
++---------------------+
+|  Receive DNS Query  |
++---------------------+
+           |
+           v
++---------------------+
+| Parse Header and    |
+| Extract Domain &    |
+| Query Type          |
++---------------------+
+           |
+           +---------------------+
+           |                     |
+           v                     v
++---------------------+  +---------------------+
+| Is Query Type       |  | Use Cache           |
+| DNSKEY/DS?          |  |                     |
++---------------------+  +---------------------+
+           |                     |
+    Yes    |                     |
+           v                     v
++---------------------+  +---------------------+
+| Return              |  | Lookup in SQLite DB |
+| DNSSEC Record       |  |                     |
++---------------------+  +---------------------+
+                                   |
+                                   v
+                        +---------------------+
+                        | Is Authoritative    |
+                        | Zone?               |
+                        +---------------------+
+                                   |
+                            No     |
+                                   v
+                        +---------------------+
+                        | Return NXDOMAIN     |
+                        +---------------------+
+                                   |
+                                   v
+                        +---------------------+
+                        | Add GSSEC           |
+                        +---------------------+
+                                   |
+                                   v
+                        +---------------------+
+                        | Send Response       |
+                        +---------------------+
+                                   |
+                                   v
+                        +---------------------+
+                        | End                 |
+                        +---------------------+
+
+```
+
+
+## 🧩 Key Components
+
+| Component      | Purpose                    | Details                                  |
+|----------------|----------------------------|------------------------------------------|
+| `DnsCache`     | DNS Response Cache         | Thread-safe HashMap with TTL             |
+| `ServerConfig` | Server Configuration       | Loaded via environment variables         |
+| `rusqlite`     | Record Storage             | SQLite database backend                  |
+| `tokio`        | Async I/O Runtime          | UDP/TCP async handlers and tasks         |
+| `DNSSEC`       | Secure DNS Signing         | RSA-SHA256 with Base64-encoded keys      |
+
+---
+
+## ⚠️ Error Handling Strategy
+
+- Custom `DnsError` enum via `thiserror`
+- Graceful shutdown via `SIGINT`
+- Cache cleanup every 5 minutes
+- Fallback to resolver forwarding
+- Detailed logging at every stage
+
+---
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
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--- /dev/null
+++ b/CODE_OF_CONDUCT.md
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+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+mailto: sunil@thakares.com.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+# Contributing to nx9-dns-server
+
+Thank you for considering contributing to nx9-dns-server! This document provides guidelines and instructions to help you contribute effectively to this project.
+
+## Table of Contents
+
+- [Code of Conduct](#code-of-conduct)
+- [Getting Started](#getting-started)
+  - [Project Setup](#project-setup)
+  - [Development Environment](#development-environment)
+- [How to Contribute](#how-to-contribute)
+  - [Reporting Bugs](#reporting-bugs)
+  - [Suggesting Enhancements](#suggesting-enhancements)
+  - [Code Contributions](#code-contributions)
+- [Pull Request Process](#pull-request-process)
+- [Style Guidelines](#style-guidelines)
+  - [Rust Code Style](#rust-code-style)
+  - [Commit Messages](#commit-messages)
+  - [Documentation](#documentation)
+- [Priority Areas](#priority-areas)
+- [Community](#community)
+- [License](#license)
+
+## Code of Conduct
+
+By participating in this project, you are expected to uphold our [Code of Conduct](CODE_OF_CONDUCT.md). Please report unacceptable behavior to [project maintainers](mailto:maintainer@example.com).
+
+## Getting Started
+
+### Project Setup
+
+1. **Fork the repository** on GitHub
+2. **Clone your fork**:
+   ```bash
+   git clone https://github.com/your-username/nx9-dns-server.git
+   cd nx9-dns-server
+   ```
+3. **Add the upstream remote**:
+   ```bash
+   git remote add upstream https://github.com/thakares/nx9-dns-server.git
+   ```
+4. **Create a branch** for your work:
+   ```bash
+   git checkout -b feature/your-feature-name
+   ```
+
+### Development Environment
+
+#### Requirements
+- Rust (stable, 1.70+)
+- SQLite 3.x
+- Cargo and standard Rust toolchain
+
+#### Setup
+1. **Install dependencies**:
+   ```bash
+   # For Debian/Ubuntu
+   sudo apt-get install build-essential pkg-config libsqlite3-dev
+   
+   # For Fedora/RHEL
+   sudo dnf install gcc sqlite-devel pkgconfig
+   
+   # For macOS with Homebrew
+   brew install sqlite
+   ```
+
+2. **Compile and run the project**:
+   ```bash
+   cargo build
+   cargo run
+   ```
+
+3. **Run tests**:
+   ```bash
+   cargo test
+   ```
+
+## How to Contribute
+
+### Reporting Bugs
+
+Before submitting a bug report:
+- Check the [issue tracker](https://github.com/thakares/nx9-dns-server/issues) to see if the issue has already been reported
+- Make sure you're using the latest version of the software
+- Perform a quick search to see if the problem has already been addressed
+
+When submitting a bug report:
+1. Use the bug report template provided
+2. Include a clear and descriptive title
+3. Describe the exact steps to reproduce the issue
+4. Provide specific examples to demonstrate the steps
+5. Describe the behavior you observed and what you expected to see
+6. Include relevant logs, screenshots, or other materials
+7. Mention your environment (OS, Rust version, etc.)
+
+### Suggesting Enhancements
+
+Enhancement suggestions are tracked as GitHub issues. When creating an enhancement suggestion:
+1. Use the feature request template provided
+2. Include a clear and descriptive title
+3. Provide a detailed description of the proposed functionality
+4. Explain why this enhancement would be useful to most users
+5. List any alternatives you've considered
+6. Include any mockups or examples if applicable
+
+### Code Contributions
+
+We're actively seeking contributions in these areas:
+
+1. **Web UI Development**
+   - Frontend components and integration with backend
+   - UI/UX design for DNS management
+
+2. **API Service**
+   - RESTful API implementation
+   - Authentication and permission handling
+   - Request validation
+
+3. **User Management**
+   - Authentication systems
+   - Role-based access control
+   - User onboarding flows
+
+4. **DNSSEC Improvements**
+   - Key rotation automation
+   - Signature verification tools
+   - DNSSEC validation utilities
+
+5. **Core DNS Improvements**
+   - Performance optimizations
+   - Additional record type support
+   - Protocol extensions
+
+6. **Documentation and Testing**
+   - Improving guides and examples
+   - Unit and integration tests
+   - Benchmarking tools
+
+## Pull Request Process
+
+1. **Update your fork** with the latest from upstream:
+   ```bash
+   git fetch upstream
+   git merge upstream/main
+   ```
+
+2. **Implement your changes** and commit them to your feature branch
+
+3. **Run the test suite** to ensure your changes don't break existing functionality:
+   ```bash
+   cargo test
+   ```
+
+4. **Add or update tests** as needed for your new functionality
+
+5. **Update documentation** including README.md if needed
+
+6. **Submit a pull request** to the main repository:
+   - Fill out the PR template completely
+   - Reference any related issues (e.g., "Fixes #123")
+   - Include a clear description of the changes and their motivation
+   - Add screenshots or terminal output if relevant
+
+7. **Code review process**:
+   - Maintainers will review your PR
+   - Address any requested changes or feedback
+   - Once approved, maintainers will merge your PR
+
+## Style Guidelines
+
+### Rust Code Style
+
+- Follow the [Rust API Guidelines](https://rust-lang.github.io/api-guidelines/)
+- Use `rustfmt` to format your code:
+  ```bash
+  cargo fmt
+  ```
+- Use `clippy` to catch common mistakes and non-idiomatic code:
+  ```bash
+  cargo clippy
+  ```
+- Follow the existing project style for consistency
+- Use meaningful variable and function names
+- Include comments for complex sections of code
+- Write comprehensive documentation for public API functions
+
+### Commit Messages
+
+- Use the present tense ("Add feature" not "Added feature")
+- Use the imperative mood ("Move cursor to..." not "Moves cursor to...")
+- Limit the first line to 72 characters or less
+- Reference issues and pull requests after the first line
+- Consider using a structured format:
+  ```
+  [Component] Short summary (up to 72 chars)
+  
+  More detailed explanation, if necessary. Wrap lines at around 72
+  characters. Explain the problem this commit is solving. Focus on why
+  you are making this change as opposed to how.
+  
+  Fixes #123
+  ```
+
+### Documentation
+
+- Use proper grammatical sentences with punctuation
+- Keep documentation up-to-date with code changes
+- Include examples where appropriate
+- Document all public API functions, structs, and traits
+- Use Markdown formatting in doc comments and documentation files
+
+## Priority Areas
+
+We are particularly interested in contributions in these areas:
+
+1. **Web UI Development**:
+   - Creating a responsive, user-friendly interface for DNS management
+   - Implementing dashboard components for monitoring DNS health
+   - Building forms for record management with validation
+
+2. **API Service**:
+   - Implementing RESTful endpoints for DNS record CRUD operations
+   - Adding authentication and authorization mechanisms
+   - Developing batch operations for efficient record updates
+
+3. **User Management**:
+   - Building a role-based access control system
+   - Implementing secure authentication flows
+   - Creating administrative tools for user management
+
+4. **Documentation**:
+   - Improving guides and examples
+   - Creating API documentation
+   - Adding diagrams and architecture documentation
+
+5. **Testing**:
+   - Unit tests for core components
+   - Integration tests for end-to-end validation
+   - Building automated CI pipelines
+
+## Community
+
+- Join our [Discord server](https://discord.com/channels/1179651660184817714/1369586647393370253) for discussions
+- Follow the project on [Twitter](https://x.com/thakares)
+- Subscribe to our [mailing list](https://example.com/mailing-list) for updates
+
+## License
+
+By contributing to nx9-dns-server, you agree that your contributions will be licensed under the project's [GNU General Public License v3.0 (GPLv3)](LICENSE).
+
+---
+
+Thank you for your interest in improving nx9-dns-server! We appreciate your time and effort in contributing to this project.
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index 0000000..6753100
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+chrono = "0.4"
diff --git a/Docker/Dockerfile b/Docker/Dockerfile
new file mode 100644
index 0000000..6ef71c8
--- /dev/null
+++ b/Docker/Dockerfile
@@ -0,0 +1,57 @@
+# Build stage
+FROM rust:1.72-slim-bookworm AS builder
+
+# Install necessary build dependencies
+RUN apt-get update && apt-get install -y \
+    musl-tools \
+    build-essential \
+    pkg-config \
+    libssl-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Add support for cross-compilation to Alpine
+RUN rustup target add x86_64-unknown-linux-musl
+
+# Create a new empty project
+WORKDIR /app
+COPY . .
+
+# Build the project with musl target
+RUN cargo build --target x86_64-unknown-linux-musl --release
+
+# Runtime stage
+FROM alpine:3.18
+
+# Install runtime dependencies
+RUN apk --no-cache add ca-certificates sqlite tzdata
+
+# Create a non-root user for running the application
+RUN addgroup -S dns && adduser -S dnsuser -G dns
+
+# Create necessary directories
+RUN mkdir -p /var/nx9-dns-server /var/log/nx9-dns-server /etc/nx9-dns-server
+RUN chown -R dnsuser:dns /var/nx9-dns-server /var/log/nx9-dns-server /etc/nx9-dns-server
+
+# Copy the compiled binary
+COPY --from=builder /app/target/x86_64-unknown-linux-musl/release/dns_server /usr/local/bin/
+RUN chmod +x /usr/local/bin/dns_server
+
+# Copy configuration files
+COPY --from=builder /app/conf/dns_records.sql /etc/nx9-dns-server/
+COPY --from=builder /app/conf/dns.db.sample /etc/nx9-dns-server/
+
+# Expose DNS ports
+EXPOSE 53/udp 53/tcp
+# Expose Web UI port
+EXPOSE 8080/tcp
+# Expose API port
+EXPOSE 8081/tcp
+
+# Set working directory
+WORKDIR /var/nx9-dns-server
+
+# Switch to non-root user
+USER dnsuser
+
+# Command to run the application
+CMD ["/usr/local/bin/dns_server"]
\ No newline at end of file
diff --git a/Docker/docker-compose.yml b/Docker/docker-compose.yml
new file mode 100644
index 0000000..d090007
--- /dev/null
+++ b/Docker/docker-compose.yml
@@ -0,0 +1,24 @@
+version: '3.8'
+
+services:
+  dns:
+    image: nx9-dns-server:latest
+    container_name: nx9-dns
+    ports:
+      - "53:53/udp"
+      - "53:53/tcp"
+      - "8080:8080"
+      - "8081:8081"
+    volumes:
+      - ./data/dns.db:/var/nx9-dns-server/dns.db
+      - ./keys:/etc/nx9-dns-server/keys
+      - ./logs:/var/log/nx9-dns-server
+    environment:
+      - DNS_BIND=0.0.0.0:53
+      - DNS_DB_PATH=/var/nx9-dns-server/dns.db
+      - DNSSEC_KEY_FILE=/etc/nx9-dns-server/keys/Kanydomain.tld.key
+      - DNS_FORWARDERS=8.8.8.8:53,1.1.1.1:53
+      - DNS_NS_RECORDS=ns1.anydomain.tld.,ns2.anydomain.tld.
+      - WEB_UI_BIND=0.0.0.0:8080
+      - API_BIND=0.0.0.0:8081
+    restart: unless-stopped
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..6ef71c8
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,57 @@
+# Build stage
+FROM rust:1.72-slim-bookworm AS builder
+
+# Install necessary build dependencies
+RUN apt-get update && apt-get install -y \
+    musl-tools \
+    build-essential \
+    pkg-config \
+    libssl-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Add support for cross-compilation to Alpine
+RUN rustup target add x86_64-unknown-linux-musl
+
+# Create a new empty project
+WORKDIR /app
+COPY . .
+
+# Build the project with musl target
+RUN cargo build --target x86_64-unknown-linux-musl --release
+
+# Runtime stage
+FROM alpine:3.18
+
+# Install runtime dependencies
+RUN apk --no-cache add ca-certificates sqlite tzdata
+
+# Create a non-root user for running the application
+RUN addgroup -S dns && adduser -S dnsuser -G dns
+
+# Create necessary directories
+RUN mkdir -p /var/nx9-dns-server /var/log/nx9-dns-server /etc/nx9-dns-server
+RUN chown -R dnsuser:dns /var/nx9-dns-server /var/log/nx9-dns-server /etc/nx9-dns-server
+
+# Copy the compiled binary
+COPY --from=builder /app/target/x86_64-unknown-linux-musl/release/dns_server /usr/local/bin/
+RUN chmod +x /usr/local/bin/dns_server
+
+# Copy configuration files
+COPY --from=builder /app/conf/dns_records.sql /etc/nx9-dns-server/
+COPY --from=builder /app/conf/dns.db.sample /etc/nx9-dns-server/
+
+# Expose DNS ports
+EXPOSE 53/udp 53/tcp
+# Expose Web UI port
+EXPOSE 8080/tcp
+# Expose API port
+EXPOSE 8081/tcp
+
+# Set working directory
+WORKDIR /var/nx9-dns-server
+
+# Switch to non-root user
+USER dnsuser
+
+# Command to run the application
+CMD ["/usr/local/bin/dns_server"]
\ No newline at end of file
diff --git a/Flow-Chart.png b/Flow-Chart.png
new file mode 100644
index 0000000..8ef146e
Binary files /dev/null and b/Flow-Chart.png differ
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+software and other kinds of works.
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+  The licenses for most software and other practical works are designed
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+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
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+  All rights granted under this License are granted for the term of
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+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
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+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
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+for you must do so exclusively on your behalf, under your direction
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+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
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+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
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+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
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+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
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+and you may offer support or warranty protection for a fee.
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+  Each time you convey a covered work, the recipient automatically
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..af43f8d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,575 @@
+# nx9-dns-server
+
+**nx9-dns-server** is a high-performance, RFC-compliant authoritative DNS server implemented in Rust. It is designed for any domain (e.g., `anydomain.tld`), supporting a wide range of DNS record types, DNSSEC, and robust operational features. The server is optimized for reliability, security, and ease of deployment in production environments.
+
+---
+
+## Table of Contents
+
+- [Features](#features)
+- [Architecture](#architecture)
+- [DNS Record Management](#dns-record-management)
+- [Web UI](#web-ui)
+- [API Service](#api-service)
+- [User Management](#user-management)
+- [DNSSEC Support](#dnssec-support)
+- [How to Create DNSSEC_KEY_FILE](#how-to-create-dnssec_key_file)
+- [Deployment](#deployment)
+  - [Traditional Deployment](#traditional-deployment)
+  - [Docker Deployment](#docker-deployment)
+- [Configuration](#configuration)
+- [Testing & Diagnostics](#testing--diagnostics)
+- [Roadmap](#roadmap)
+- [Contributing](#contributing)
+- [License](#license)
+- [Acknowledgements](#acknowledgements)
+
+---
+
+## Features
+
+- **Authoritative DNS**: Serves authoritative responses for all queries to your domain (e.g., `anydomain.tld`).
+- **Multi-Record Support**: Handles A, AAAA, MX, NS, SOA, PTR, TXT, and CNAME records.
+- **DNSSEC Ready**: Supports DNSSEC key management and secure record signing.
+- **High Performance**: Asynchronous networking (UDP/TCP) via Tokio for handling thousands of concurrent queries.
+- **RFC Compliance**: Strict adherence to DNS protocol standards for interoperability.
+- **Extensible Storage**: Uses SQLite for DNS record storage, allowing easy updates and migrations.
+- **Easy Deployment**: Includes deployment and update scripts for smooth operational workflows.
+- **Comprehensive Logging**: Integrates with `env_logger` for detailed runtime diagnostics.
+- **Web Interface**: (Coming soon) Administrative web UI for DNS record management.
+- **API Service**: (Coming soon) RESTful API service for programmatic DNS record management.
+- **User Management**: (Coming soon) Multi-user access control with role-based permissions.
+
+---
+
+## Architecture
+
+- **Language**: Rust (2021 edition)
+- **Async Runtime**: [Tokio](https://tokio.rs/)
+- **Database**: SQLite via [rusqlite](https://crates.io/crates/rusqlite)
+- **Logging**: [log](https://crates.io/crates/log) and [env_logger](https://crates.io/crates/env_logger)
+- **Error Handling**: [thiserror](https://crates.io/crates/thiserror)
+- **DNSSEC**: Built-in support for key loading and RRSIG/DS/DNSKEY records
+- **Web Framework**: (Coming soon) [Rocket](https://rocket.rs/) or [Axum](https://github.com/tokio-rs/axum) for UI and API endpoints
+- **Authentication**: (Coming soon) JWT-based authentication and role-based authorization
+- **Containerization**: Docker support with Alpine Linux for minimal footprint
+- **Cross-Compilation**: Support for building from Debian to Alpine Linux (musl) target
+
+---
+
+## DNS Record Management
+
+DNS records are managed in an SQLite database (`dns.db`). The schema supports multiple records per domain and type, and can be easily updated using SQL scripts.
+
+**Example schema (`dns_records.sql`):**
+```sql
+CREATE TABLE IF NOT EXISTS dns_records (
+  domain TEXT NOT NULL,
+  record_type TEXT NOT NULL,
+  value TEXT NOT NULL,
+  ttl INTEGER DEFAULT 3600,
+  PRIMARY KEY (domain, record_type, value)
+) WITHOUT ROWID;
+```
+
+**Sample records:**
+```sql
+INSERT OR REPLACE INTO dns_records VALUES
+('anydomain.tld', 'A', '203.0.113.10', 3600),
+('anydomain.tld', 'MX', '10 mail.anydomain.tld', 3600),
+('anydomain.tld', 'NS', 'ns1.anydomain.tld', 3600),
+('anydomain.tld', 'NS', 'ns2.anydomain.tld', 3600),
+('anydomain.tld', 'SOA', 'ns1.anydomain.tld hostmaster.anydomain.tld 1 10800 3600 604800 86400', 3600),
+('anydomain.tld', 'TXT', '"v=spf1 a mx ~all"', 3600),
+('www.anydomain.tld', 'A', '203.0.113.10', 3600);
+```
+
+---
+
+## Web UI
+
+> 🚧 **Under Development - Seeking Contributors!** 🚧
+>
+> We're actively looking for community contributions to our Web UI implementation. If you have experience with Rust web frameworks (Rocket/Axum) and modern frontend technologies (React/Vue/Svelte), please consider contributing!
+
+The planned Web UI will provide:
+
+- **Dashboard**: Visual overview of DNS zone statistics and recent queries
+- **Record Management**: Intuitive interface for creating, viewing, updating, and deleting DNS records
+- **DNSSEC Management**: UI for key generation, rotation, and signature verification
+- **Audit Logging**: Visual timeline of all record changes with user attribution
+- **Responsive Design**: Mobile-friendly interface for management on any device
+
+**Tech Stack (Proposed):**
+- Backend: Rust with Rocket or Axum
+- Frontend: TypeScript with React or Svelte
+- Authentication: JWT-based with session management
+
+**Contribution Areas:**
+- UI/UX design mockups
+- Frontend component development
+- API integration
+- Automated testing
+- Documentation
+
+If interested in contributing, please open an issue discussing your implementation approach before submitting PRs.
+
+---
+
+## API Service
+
+> 🚧 **Under Development - Seeking Contributors!** 🚧
+>
+> We're building a RESTful API service for programmatic DNS record management. Contributors with experience in API design and Rust web services are welcome!
+
+The DNS record management API will provide:
+
+- **Full CRUD Operations**: Create, read, update, and delete DNS records via REST endpoints
+- **Batch Operations**: Support for bulk record changes in a single request
+- **Validation**: Strict validation of record syntax and domain integrity
+- **Rate Limiting**: Protection against API abuse
+- **Authentication**: Secure token-based authentication with scoped permissions
+- **Webhooks**: (Planned) Event notifications for record changes
+
+**Planned Endpoints:**
+```
+GET    /api/v1/zones                  # List all zones
+POST   /api/v1/zones                  # Create new zone
+GET    /api/v1/zones/{zone}           # Get zone details
+PUT    /api/v1/zones/{zone}           # Update zone properties
+DELETE /api/v1/zones/{zone}           # Remove zone
+
+GET    /api/v1/zones/{zone}/records               # List all records in zone
+POST   /api/v1/zones/{zone}/records               # Create new record
+GET    /api/v1/zones/{zone}/records/{id}          # Get record details
+PUT    /api/v1/zones/{zone}/records/{id}          # Update record
+DELETE /api/v1/zones/{zone}/records/{id}          # Remove record
+
+POST   /api/v1/zones/{zone}/records/batch         # Batch create/update/delete
+```
+
+If you're interested in contributing to the API service, please refer to our API design document in the project wiki.
+
+---
+
+## User Management
+
+> 🚧 **Under Development - Community Input Requested!** 🚧
+>
+> We're designing a user management system and need input from the community on requirements and features.
+
+Planned user management features:
+
+- **Multi-User Support**: Multiple administrator and operator accounts
+- **Role-Based Access Control**: Granular permissions for different user roles
+- **Authentication Options**: Local accounts and potential OAuth/LDAP integration
+- **Audit Trail**: Comprehensive logging of all user actions
+- **Password Policies**: Configurable password requirements and rotation policies
+- **Two-Factor Authentication**: Additional security layer for administrative access
+- **API Tokens**: Management of scoped API tokens for programmatic access
+
+**User Roles (Proposed):**
+- **Administrator**: Full system access
+- **Operator**: Can manage DNS records but not system settings
+- **Viewer**: Read-only access to records and statistics
+- **API Client**: Programmatic access via API tokens
+
+**We welcome community input on:**
+- Authentication mechanisms
+- Additional role definitions and permission scopes
+- UI/UX design for user management interfaces
+- Enterprise integration requirements
+
+Please open an issue with the tag `user-management` to share your feedback and requirements.
+
+---
+
+## DNSSEC Support
+
+- **Key Management**: DNSSEC keys are loaded from environment-configured paths.
+- **Record Signing**: Supports RRSIG, DS, and DNSKEY records for secure, signed DNS responses.
+- **Preprocessing**: Key files can be preprocessed using provided scripts before deployment.
+
+---
+
+## How to Create `DNSSEC_KEY_FILE`
+
+To enable DNSSEC for `nx9-dns-server`, you need to generate a DNSSEC key pair and provide the public key file to the server via the `DNSSEC_KEY_FILE` environment variable. Here's how you can do it using [BIND's dnssec-keygen tool](https://bind9.readthedocs.io/en/latest/reference.html#dnssec-keygen):
+
+### 1. Install `dnssec-keygen`
+
+On most Linux systems, you can install it via the package manager:
+
+```bash
+sudo apt-get install bind9-dnsutils   # Debian/Ubuntu
+# or
+sudo yum install bind-utils           # CentOS/RHEL
+```
+
+### 2. Generate DNSSEC Key Pair
+
+Run the following command to generate a 2048-bit RSA key for your domain (replace `anydomain.tld` with your actual domain):
+
+```bash
+dnssec-keygen -a RSASHA256 -b 2048 -n ZONE anydomain.tld
+```
+
+- This will produce two files in your current directory:
+  - `K.+008+.key` (public key)
+  - `K.+008+.private` (private key)
+
+### 3. Set the `DNSSEC_KEY_FILE` Environment Variable
+
+Copy the public key file (`.key`) to your server's key directory (e.g., `/var/nx9-dns-server/`):
+
+```bash
+cp Kanydomain.tld.+008+24550.key /var/nx9-dns-server/
+```
+
+Then, set the environment variable in your deployment environment or systemd service:
+
+```bash
+export DNSSEC_KEY_FILE="/var/nx9-dns-server/Kanydomain.tld.+008+24550.key"
+```
+
+Or in your systemd unit file:
+```
+Environment="DNSSEC_KEY_FILE=/var/nx9-dns-server/Kanydomain.tld.+008+24550.key"
+```
+
+### 4. (Optional) Preprocess the Key
+
+If your deployment uses a preprocessing script (as referenced in your `deploy.sh`), run:
+
+```bash
+sudo chmod +x /var/nx9-dns-server/preprocess-key.sh
+sudo -u dnsuser /var/nx9-dns-server/preprocess-key.sh
+```
+This may normalize the key format or permissions as required by your server.
+
+### 5. Restart the DNS Server
+
+After setting the key file, restart your DNS server to load the new key:
+
+```bash
+sudo systemctl restart dns-server.service
+```
+
+### 6. Verify DNSSEC is Working
+
+Use the provided `dnscheck.sh` script or `dig` to verify DNSSEC records:
+
+```bash
+bash dnscheck.sh
+# or manually:
+dig @localhost anydomain.tld DNSKEY +dnssec
+```
+
+**Note:**  
+- Keep your `.private` key file secure and never expose it publicly.
+- Only the `.key` (public) file should be referenced by the server.
+- The server will load and use the public key for signing DNS responses.
+
+---
+
+## Deployment
+
+### Traditional Deployment
+
+Deployment is automated and robust, using the provided [`deploy.sh`](deploy.sh) script. This script handles permissions, key preprocessing, SOA updates, binary replacement, and service management.
+
+**Typical deployment steps:**
+```bash
+#!/bin/bash
+
+set -e
+
+SRC_BIN="/home/youruser/apps/your-ddns/dns_server"
+DEST_DIR="/var/nx9-dns-server"
+DEST_BIN="$DEST_DIR/dns_server"
+PREPROCESS_SCRIPT="$DEST_DIR/preprocess-key.sh"
+SOA_UPDATE_SCRIPT="$DEST_DIR/soa-update.sh"
+
+echo "🔐 Fixing permissions and running preprocess..."
+sudo chmod +x "$PREPROCESS_SCRIPT"
+sudo -u dnsuser "$PREPROCESS_SCRIPT"
+
+echo "🛠 Updating SOA record..."
+sudo chown dnsuser:dnsuser "$SOA_UPDATE_SCRIPT"
+sudo chmod +x "$SOA_UPDATE_SCRIPT"
+sudo -u dnsuser "$SOA_UPDATE_SCRIPT"
+
+echo "📄 Verifying processed.key content..."
+sudo cat "$DEST_DIR/processed.key"
+
+echo "🛑 Stopping DNS server..."
+sudo systemctl stop dns-server.service
+
+echo "📦 Deploying new dns_server binary..."
+sudo cp "$SRC_BIN" "$DEST_BIN"
+sudo chown dnsuser:dnsuser "$DEST_DIR"
+
+echo "🔁 Reloading systemd and restarting service..."
+sudo systemctl daemon-reload
+sudo systemctl restart dns-server.service
+
+echo "📈 Checking service status..."
+sudo systemctl status dns-server.service
+```
+See [`deploy.sh`](deploy.sh) for the full deployment script.
+
+### Docker Deployment
+
+We provide a Docker-based deployment option using Alpine Linux for a minimal and secure container.
+
+#### Dockerfile
+
+```Dockerfile
+# Build stage
+FROM rust:1.72-slim-bookworm AS builder
+
+# Install necessary build dependencies
+RUN apt-get update && apt-get install -y \
+    musl-tools \
+    build-essential \
+    pkg-config \
+    libssl-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Add support for cross-compilation to Alpine
+RUN rustup target add x86_64-unknown-linux-musl
+
+# Create a new empty project
+WORKDIR /app
+COPY . .
+
+# Build the project with musl target
+RUN cargo build --target x86_64-unknown-linux-musl --release
+
+# Runtime stage
+FROM alpine:3.18
+
+# Install runtime dependencies
+RUN apk --no-cache add ca-certificates sqlite tzdata
+
+# Create a non-root user for running the application
+RUN addgroup -S dns && adduser -S dnsuser -G dns
+
+# Create necessary directories
+RUN mkdir -p /var/nx9-dns-server /var/log/nx9-dns-server /etc/nx9-dns-server
+RUN chown -R dnsuser:dns /var/nx9-dns-server /var/log/nx9-dns-server /etc/nx9-dns-server
+
+# Copy the compiled binary
+COPY --from=builder /app/target/x86_64-unknown-linux-musl/release/dns_server /usr/local/bin/
+RUN chmod +x /usr/local/bin/dns_server
+
+# Copy configuration files
+COPY --from=builder /app/conf/dns_records.sql /etc/nx9-dns-server/
+COPY --from=builder /app/conf/dns.db.sample /etc/nx9-dns-server/
+
+# Expose DNS ports
+EXPOSE 53/udp 53/tcp
+# Expose Web UI port
+EXPOSE 8080/tcp
+# Expose API port
+EXPOSE 8081/tcp
+
+# Set working directory
+WORKDIR /var/nx9-dns-server
+
+# Switch to non-root user
+USER dnsuser
+
+# Command to run the application
+CMD ["/usr/local/bin/dns_server"]
+```
+
+#### Building the Docker Image
+
+```bash
+# Clone the repository
+git clone https://github.com/thakares/nx9-dns-server.git
+cd nx9-dns-server
+
+# Build the Docker image
+docker build -t nx9-dns-server:latest .
+```
+
+#### Running the Container
+
+```bash
+# Run with basic configuration
+docker run -d --name nx9-dns \
+  -p 53:53/udp -p 53:53/tcp \
+  -p 8080:8080 -p 8081:8081 \
+  -v /path/to/dns.db:/var/nx9-dns-server/dns.db \
+  -v /path/to/keys:/etc/nx9-dns-server/keys \
+  -e DNS_BIND=0.0.0.0:53 \
+  -e DNS_DB_PATH=/var/nx9-dns-server/dns.db \
+  -e DNSSEC_KEY_FILE=/etc/nx9-dns-server/keys/Kanydomain.tld.key \
+  -e WEB_UI_BIND=0.0.0.0:8080 \
+  -e API_BIND=0.0.0.0:8081 \
+  nx9-dns-server:latest
+```
+
+#### Using Docker Compose
+
+For more complex deployments, a `docker-compose.yml` file is recommended:
+
+```yaml
+version: '3.8'
+
+services:
+  dns:
+    image: nx9-dns-server:latest
+    container_name: nx9-dns
+    ports:
+      - "53:53/udp"
+      - "53:53/tcp"
+      - "8080:8080"
+      - "8081:8081"
+    volumes:
+      - ./data/dns.db:/var/nx9-dns-server/dns.db
+      - ./keys:/etc/nx9-dns-server/keys
+      - ./logs:/var/log/nx9-dns-server
+    environment:
+      - DNS_BIND=0.0.0.0:53
+      - DNS_DB_PATH=/var/nx9-dns-server/dns.db
+      - DNSSEC_KEY_FILE=/etc/nx9-dns-server/keys/Kanydomain.tld.key
+      - DNS_FORWARDERS=8.8.8.8:53,1.1.1.1:53
+      - DNS_NS_RECORDS=ns1.anydomain.tld.,ns2.anydomain.tld.
+      - WEB_UI_BIND=0.0.0.0:8080
+      - API_BIND=0.0.0.0:8081
+    restart: unless-stopped
+```
+
+To run with Docker Compose:
+
+```bash
+docker-compose up -d
+```
+
+---
+
+## Configuration
+
+Configuration is environment-driven and highly flexible.
+
+**Key environment variables:**
+- `DNS_BIND`: Bind address (default: `0.0.0.0:53`)
+- `DNS_DB_PATH`: Path to the SQLite database (default: `dns.db`)
+- `DNSSEC_KEY_FILE`: Path to DNSSEC key file
+- `DNS_FORWARDERS`: Comma-separated list of upstream DNS resolvers
+- `DNS_NS_RECORDS`: Comma-separated list of NS records
+- `DNS_CACHE_TTL`: Cache TTL in seconds
+- `WEB_UI_BIND`: Bind address for web interface (default: `127.0.0.1:8080`)
+- `API_BIND`: Bind address for API service (default: `127.0.0.1:8081`)
+- `AUTH_SECRET`: Secret key for JWT token signing
+- `ADMIN_PASSWORD`: Initial admin password (only used if no users exist)
+
+**Example:**
+```bash
+export DNS_BIND="0.0.0.0:53"
+export DNS_DB_PATH="/var/nx9-dns-server/dns.db"
+export DNSSEC_KEY_FILE="/var/nx9-dns-server/Kanydomain.tld.+008+24550.key"
+export DNS_FORWARDERS="8.8.8.8:53,1.1.1.1:53"
+export DNS_NS_RECORDS="ns1.anydomain.tld.,ns2.anydomain.tld."
+export WEB_UI_BIND="0.0.0.0:8080"
+export API_BIND="0.0.0.0:8081"
+export AUTH_SECRET="your-secure-random-string-here"
+```
+
+---
+
+## Testing & Diagnostics
+
+A suite of shell scripts is provided for diagnostics and record verification:
+
+- **dnscheck.sh**: Runs a series of `dig` queries for all major record types and DNSSEC.
+- **dns_dump.sh**: Dumps all record types for a given domain.
+- **api_test.sh**: (Coming soon) Tests the API endpoints with sample requests.
+- **performance_test.sh**: (Coming soon) Benchmarks server performance under load.
+
+**Example usage:**
+```bash
+bash dnscheck.sh
+bash dns_dump.sh anydomain.tld
+```
+
+---
+
+## Roadmap
+
+Our planned features and improvements:
+
+### Short-term (1-3 months)
+- [x] Core DNS server functionality
+- [x] DNSSEC implementation
+- [ ] Web UI development (in progress)
+- [ ] RESTful API service (in progress)
+- [ ] User management system (planning)
+- [ ] Docker container support
+
+### Medium-term (3-6 months)
+- [ ] Clustered deployment support
+- [ ] Metrics and monitoring integration (Prometheus)
+- [ ] Zone transfer (AXFR/IXFR) support
+- [ ] Dynamic DNS update protocol (RFC 2136)
+- [ ] DNSSEC key rotation automation
+- [ ] Kubernetes Helm charts for enterprise deployment
+
+### Long-term (6+ months)
+- [ ] Secondary/slave DNS server support
+- [ ] Geo-based DNS responses
+- [ ] DNS over HTTPS (DoH) support
+- [ ] DNS over TLS (DoT) support
+- [ ] Record templating system
+
+---
+
+## Contributing
+
+Contributions, bug reports, and feature requests are welcome! Please open issues or pull requests via GitHub.
+
+### Priority Contribution Areas
+We're actively seeking contributions in these areas:
+
+1. **Web UI Development**: Frontend components and integration with the backend
+2. **API Service**: RESTful API implementation for DNS record management
+3. **User Management**: Authentication, authorization, and user interface
+4. **Documentation**: Improving guides and examples
+5. **Testing**: Unit tests, integration tests, and automated CI pipelines
+
+### How to Contribute
+1. Fork the repository
+2. Create a feature branch: `git checkout -b feature/amazing-feature`
+3. Commit your changes: `git commit -m 'Add some amazing feature'`
+4. Push to the branch: `git push origin feature/amazing-feature`
+5. Open a Pull Request
+
+Please see [CONTRIBUTING.md](CONTRIBUTING.md) for detailed contribution guidelines.
+
+---
+
+## License
+
+This project is licensed under the [GNU General Public License v3.0 (GPLv3)](LICENSE).
+
+---
+
+## Acknowledgements
+
+- [Tokio](https://tokio.rs/) for async runtime
+- [rusqlite](https://crates.io/crates/rusqlite) for SQLite integration
+- [dig](https://linux.die.net/man/1/dig) for DNS diagnostics
+- Community contributors and supporters
+
+---
+
+**nx9-dns-server** is developed and maintained by Sunil Purushottam Thakare <sunil@thakares.com>.  
+For more information, see the source code or contact the maintainer via GitHub.
+
+---
+
+**Tip:**  
+Replace `anydomain.tld` with your actual domain throughout the configuration and database files.
diff --git a/deploy-dns-server.sh b/deploy-dns-server.sh
new file mode 100644
index 0000000..9da394a
--- /dev/null
+++ b/deploy-dns-server.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+
+set -e  # Exit on error
+
+echo "🔧 Making preprocess-key.sh executable..."
+sudo chmod +x /var/nx9-dns-server/preprocess-key.sh
+
+echo "👤 Running preprocess-key.sh as dnsuser..."
+sudo -u dnsuser /var/nx9-dns-server/preprocess-key.sh
+
+echo "🔧 Setting ownership and permissions for soa-update.sh..."
+sudo chown dnsuser:dnsuser /var/nx9-dns-server/soa-update.sh
+sudo chmod +x /var/nx9-dns-server/soa-update.sh
+
+echo "👤 Running soa-update.sh as dnsuser..."
+sudo -u dnsuser /var/nx9-dns-server/soa-update.sh
+
+echo "📄 Checking output of processed.key..."
+sudo cat /var/nx9-dns-server/processed.key
+
+echo "🛑 Stopping dns-server.service..."
+sudo systemctl stop dns-server.service
+
+echo "📦 Deploying compiled binary to /var/nx9-dns-server..."
+sudo cp /home/sunil/apps/nx9-bzo-ddns/dns_server /var/nx9-dns-server/dns_server
+
+echo "👤 Fixing ownership of /var/nx9-dns-server..."
+sudo chown dnsuser:dnsuser /var/nx9-dns-server
+
+echo "🔄 Reloading systemd daemon and restarting service..."
+sudo systemctl daemon-reload
+sudo systemctl restart dns-server.service
+
+echo "📡 Checking status of dns-server.service..."
+sudo systemctl status dns-server.service
diff --git a/deploy.sh b/deploy.sh
new file mode 100644
index 0000000..f6769dd
--- /dev/null
+++ b/deploy.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+set -e
+
+# Paths
+SRC_BIN="/home/<user-name>/apps/nx9-dns-server/dns_server"
+DEST_DIR="/var/nx9-dns-server"
+DEST_BIN="$DEST_DIR/nx9-dns_server"
+PREPROCESS_SCRIPT="$DEST_DIR/preprocess-key.sh"
+SOA_UPDATE_SCRIPT="$DEST_DIR/soa-update.sh"
+
+echo "🔐 Fixing permissions and running preprocess..."
+sudo chmod +x "$PREPROCESS_SCRIPT"
+sudo -u dnsuser "$PREPROCESS_SCRIPT"
+
+echo "🛠 Updating SOA record..."
+sudo chown dnsuser:dnsuser "$SOA_UPDATE_SCRIPT"
+sudo chmod +x "$SOA_UPDATE_SCRIPT"
+sudo -u dnsuser "$SOA_UPDATE_SCRIPT"
+
+echo "📄 Verifying processed.key content..."
+sudo cat "$DEST_DIR/processed.key"
+
+echo "🛑 Stopping DNS server..."
+sudo systemctl stop dns-server.service
+
+echo "📦 Deploying new dns_server binary..."
+sudo cp "$SRC_BIN" "$DEST_BIN"
+sudo chown dnsuser:dnsuser "$DEST_DIR"
+
+echo "🔁 Reloading systemd and restarting service..."
+sudo systemctl daemon-reload
+sudo systemctl restart dns-server.service
+
+echo "📈 Checking service status..."
+sudo systemctl status dns-server.service
diff --git a/dns_dump.sh b/dns_dump.sh
new file mode 100644
index 0000000..0a1d293
--- /dev/null
+++ b/dns_dump.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+DOMAIN=$1
+RECORDS="A AAAA MX TXT CNAME NS SOA PTR"
+
+for TYPE in $RECORDS; do
+    echo "== $TYPE records for $DOMAIN =="
+    dig $DOMAIN $TYPE 
+    echo
+done
diff --git a/dns_records.sql b/dns_records.sql
new file mode 100644
index 0000000..6e1dd38
--- /dev/null
+++ b/dns_records.sql
@@ -0,0 +1,36 @@
+-- dns.query - SQL commands to populate DNS records
+BEGIN TRANSACTION;
+
+-- First modify the table schema to allow multiple NS records
+CREATE TABLE IF NOT EXISTS dns_records (
+    domain TEXT NOT NULL,
+    record_type TEXT NOT NULL,
+    value TEXT NOT NULL,
+    ttl INTEGER DEFAULT 3600,
+    PRIMARY KEY (domain, record_type, value)
+) WITHOUT ROWID;
+
+-- Copy existing data to new table
+INSERT INTO dns_records_new SELECT * FROM dns_records;
+
+-- Replace the old table
+DROP TABLE dns_records;
+ALTER TABLE dns_records_new RENAME TO dns_records;
+
+-- Now insert all DNS records
+INSERT OR REPLACE INTO dns_records VALUES
+    ('33.61.254.60.in-addr.arpa', 'PTR', 'ns1.yourdomain.tld', 3600),
+    ('admin.yourdomain.tld', 'A', '60.254.61.33', 3600),
+    ('api.yourdomain.tld', 'A', '60.254.61.33', 3600),
+    ('yourdomain.tld', 'A', '60.254.61.33', 3600),
+    ('yourdomain.tld', 'MX', '10 mail.yourdomain.tld', 3600),
+    ('yourdomain.tld', 'NS', 'ns1.yourdomain.tld', 3600),
+    ('yourdomain.tld', 'NS', 'ns2.yourdomain.tld', 3600),  -- This will now work with the new schema
+    ('yourdomain.tld', 'SOA', 'ns1.yourdomain.tld hostmaster.yourdomain.tld 1 10800 3600 604800 86400', 3600),
+    ('yourdomain.tld', 'TXT', '"v=spf1 a mx ~all"', 3600),
+    ('ddns.yourdomain.tld', 'A', '60.254.61.33', 3600),
+    ('ns1.yourdomain.tld', 'A', '60.254.61.33', 3600),
+    ('ns2.yourdomain.tld', 'A', '60.254.61.33', 3600),
+    ('www.yourdomain.tld', 'A', '60.254.61.33', 3600);
+
+COMMIT;
diff --git a/dns_server.service b/dns_server.service
new file mode 100644
index 0000000..938d699
--- /dev/null
+++ b/dns_server.service
@@ -0,0 +1,33 @@
+[Unit]
+Description=NX9 DNS Server
+After=network.target
+
+[Service]
+User=dnsuser
+Group=dnsuser
+WorkingDirectory=/var/nx9-dns-server
+ExecStart=/var/dns-server/nx9-dns_server  # Run directly, skip wrapper
+Restart=always
+Environment=DNS_BIND=0.0.0.0:53
+Environment=DNS_ENABLE_IPV6=1
+Environment=DNS_MAX_PACKET_SIZE=4096
+Environment=DNS_DB_PATH=/var/nx9-dns-server/dns.db
+Environment=DNS_NS_RECORDS=ns1.yourdomain.tld.,ns2.yourdomain.tld.
+Environment=DNS_AUTHORITATIVE=1
+Environment=DNS_CACHE_TTL=300
+Environment=RUST_LOG=info
+Environment=DNS_DEFAULT_DOMAIN=yourdomain.tld
+Environment=DNS_DEFAULT_IP=<YOUR-PUBLIC-IP4>
+Environment="DNS_RECURSIVE=1" # Enable recursive resolution
+Environment="DNS_CACHE_SIZE=10000" 
+Environment="DNS_FORWARDERS=8.8.8.8:53,1.1.1.1:53,9.9.9.9:53"
+
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+AmbientCapabilities=CAP_NET_BIND_SERVICE
+ReadWritePaths=/var/nx9-dns-server
+ProtectSystem=full
+LimitNOFILE=65536
+
+[Install]
+WantedBy=multi-user.target
+
diff --git a/dns_wrapper.sh b/dns_wrapper.sh
new file mode 100644
index 0000000..07ff78e
--- /dev/null
+++ b/dns_wrapper.sh
@@ -0,0 +1,22 @@
+# Create a file at /var/nx9-dns-server/dns_wrapper.sh
+#!/bin/bash
+# Log start with timestamp
+echo "Starting DNS server at $(date)" >> /var/log/nx9-dns_server_wrapper.log
+
+# Export all environment variables explicitly
+export DNS_DB_PATH=/var/nx9-dns-server/dns.db
+export DNS_BIND=0.0.0.0:53
+export DNS_ENABLE_IPV6=1
+export DNS_MAX_PACKET_SIZE=4096
+export DNS_NS_RECORDS=ns1.yourdomain.tld.,ns2.yourdomain.tld.
+export DNS_AUTHORITATIVE=1
+export DNS_CACHE_TTL=300
+export RUST_LOG=info
+export DNS_DEFAULT_DOMAIN=yourdomain.tld
+export DNS_DEFAULT_IP=<YOUR-PUBLIC-IP4>
+
+# Print environment for debugging
+env >> /var/log/nx9-dns-server_wrapper.log
+
+# Run the DNS server
+/var/dns-server/nx9-dns-server
diff --git a/dnscheck.sh b/dnscheck.sh
new file mode 100644
index 0000000..e37be5b
--- /dev/null
+++ b/dnscheck.sh
@@ -0,0 +1,44 @@
+#!/bin/bash
+
+DOMAIN="yourdomain.tld"
+DNS_SERVER="192.168.1.200" # your LAN Server Address
+
+echo "=== DNS Diagnostic Report for $DOMAIN using $DNS_SERVER ==="
+echo
+
+# DNSKEY with DNSSEC
+echo ">>> DNSKEY (with DNSSEC):"
+dig @"$DNS_SERVER" "$DOMAIN." DNSKEY +dnssec 
+echo
+
+# DS record
+echo ">>> DS Record:"
+dig @"$DNS_SERVER" "$DOMAIN." DS 
+echo
+
+# NS record
+echo ">>> NS Record:"
+dig @"$DNS_SERVER" "$DOMAIN." NS 
+echo
+
+# MX record
+echo ">>> MX Record:"
+dig @"$DNS_SERVER" "$DOMAIN." MX 
+echo
+
+# SOA record
+echo ">>> SOA Record:"
+dig @"$DNS_SERVER" "$DOMAIN." SOA 
+echo
+
+# A record
+echo ">>> A Record:"
+dig @"$DNS_SERVER" "$DOMAIN." A 
+echo
+
+# Optional: check AAAA (IPv6) record
+echo ">>> AAAA (IPv6) Record:"
+dig @"$DNS_SERVER" "$DOMAIN." AAAA 
+echo
+
+echo "=== End of DNS Report ==="
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..d090007
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,24 @@
+version: '3.8'
+
+services:
+  dns:
+    image: nx9-dns-server:latest
+    container_name: nx9-dns
+    ports:
+      - "53:53/udp"
+      - "53:53/tcp"
+      - "8080:8080"
+      - "8081:8081"
+    volumes:
+      - ./data/dns.db:/var/nx9-dns-server/dns.db
+      - ./keys:/etc/nx9-dns-server/keys
+      - ./logs:/var/log/nx9-dns-server
+    environment:
+      - DNS_BIND=0.0.0.0:53
+      - DNS_DB_PATH=/var/nx9-dns-server/dns.db
+      - DNSSEC_KEY_FILE=/etc/nx9-dns-server/keys/Kanydomain.tld.key
+      - DNS_FORWARDERS=8.8.8.8:53,1.1.1.1:53
+      - DNS_NS_RECORDS=ns1.anydomain.tld.,ns2.anydomain.tld.
+      - WEB_UI_BIND=0.0.0.0:8080
+      - API_BIND=0.0.0.0:8081
+    restart: unless-stopped
\ No newline at end of file
diff --git a/flow-chart.png b/flow-chart.png
new file mode 100644
index 0000000..8ef146e
Binary files /dev/null and b/flow-chart.png differ
diff --git a/preprocess-key.sh b/preprocess-key.sh
new file mode 100644
index 0000000..040c696
--- /dev/null
+++ b/preprocess-key.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+INPUT_FILE="/var/nx9-dns-server/Kyourdomain.+nnn+nnnnn.key"
+OUTPUT_FILE="/var/nx9-dns-server/processed.key"
+
+# Extract and clean the DNSKEY record
+DNSKEY_RECORD=$(grep -E '^[^;].*IN[[:space:]]+DNSKEY' "$INPUT_FILE" | head -1)
+
+if [ -z "$DNSKEY_RECORD" ]; then
+    echo "Error: No valid DNSKEY record found" >&2
+    exit 1
+fi
+
+# Format: "domain. IN DNSKEY flags protocol algorithm key"
+echo "$DNSKEY_RECORD" | awk '{
+    # Remove comments and extra spaces
+    gsub(/;.*$/, "");
+    gsub(/[[:space:]]+/, " ");
+    # Reconstruct with clean base64
+    printf "%s %s %s %s %s %s ", $1, $2, $3, $4, $5, $6;
+    # Print key without any whitespace
+    for (i=7; i<=NF; i++) printf "%s", $i;
+    print "";
+}' > "$OUTPUT_FILE"
+
+exit 0
diff --git a/soa-update.sh b/soa-update.sh
new file mode 100644
index 0000000..f94356f
--- /dev/null
+++ b/soa-update.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+DB_PATH="/var/nx9-dns-server/dns.db"
+ZONE="yourdomain.tld"
+
+# Get today's date and an incremental suffix
+DATE=$(date +%Y%m%d)
+SERIAL_SUFFIX="01"
+NEW_SERIAL="${DATE}${SERIAL_SUFFIX}"
+
+# Update SOA value
+sqlite3 "$DB_PATH" <<EOF
+UPDATE dns_records
+SET value = 'ns1.yourdomain.tld hostmaster.yourdomain.tld $NEW_SERIAL 10800 3600 604800 86400'
+WHERE domain = '$ZONE' AND record_type = 'SOA';
+EOF
+
+echo "SOA record updated with serial: $NEW_SERIAL"
diff --git a/src/cache.rs b/src/cache.rs
new file mode 100644
index 0000000..b3486e0
--- /dev/null
+++ b/src/cache.rs
@@ -0,0 +1,102 @@
+//! DNS cache implementation.
+//!
+//! This module provides a simple in-memory cache for DNS records to improve
+//! performance by avoiding repeated database lookups for frequently accessed domains.
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+use std::{
+    collections::HashMap,
+    sync::{Arc, Mutex, OnceLock},
+    time::{Duration, SystemTime},
+};
+use log::debug;
+
+/// Interval for cleaning up expired cache entries (in seconds).
+pub const CACHE_CLEANUP_INTERVAL: Duration = Duration::from_secs(300);
+
+/// Global cache instance.
+pub static CACHE: OnceLock<DnsCache> = OnceLock::new();
+
+/// An entry in the DNS cache.
+#[derive(Debug, Clone)]
+pub struct CacheEntry {
+    /// The IP address for the domain.
+    pub ip: String,
+    
+    /// When this entry was added to the cache.
+    pub inserted: SystemTime,
+    
+    /// Time-to-live in seconds.
+    pub ttl: u64,
+}
+
+/// Cache for DNS records to improve performance.
+#[derive(Debug, Clone)]
+pub struct DnsCache {
+    /// Map of domain names to cache entries.
+    pub entries: Arc<Mutex<HashMap<String, CacheEntry>>>,
+    
+    /// List of NS records for zones this server is authoritative for.
+    pub ns_records: Vec<String>,
+}
+
+impl DnsCache {
+    /// Create a new DNS cache.
+    ///
+    /// # Arguments
+    /// * `ns_records` - List of NS records for zones this server is authoritative for.
+    ///
+    /// # Returns
+    /// A new `DnsCache` instance.
+    pub fn new(ns_records: Vec<String>) -> Self {
+        Self {
+            entries: Arc::new(Mutex::new(HashMap::new())),
+            ns_records,
+        }
+    }
+
+    /// Get a cached IP address for a domain.
+    ///
+    /// # Arguments
+    /// * `domain` - The domain name to look up.
+    ///
+    /// # Returns
+    /// An `Option` containing the IP address and TTL if found and not expired.
+    pub fn get(&self, domain: &str) -> Option<(String, u64)> {
+        let cache = self.entries.lock().unwrap();
+        if let Some(entry) = cache.get(domain) {
+            if entry.inserted.elapsed().map(|d| d.as_secs() <= entry.ttl).unwrap_or(true) {
+                return Some((entry.ip.clone(), entry.ttl));
+            }
+        }
+        None
+    }
+
+    /// Add or update a domain in the cache.
+    ///
+    /// # Arguments
+    /// * `domain` - The domain name to cache.
+    /// * `ip` - The IP address for the domain.
+    /// * `ttl` - Time-to-live in seconds.
+    pub fn set(&self, domain: String, ip: String, ttl: u64) {
+        let mut cache = self.entries.lock().unwrap();
+        cache.insert(
+            domain,
+            CacheEntry {
+                ip,
+                inserted: SystemTime::now(),
+                ttl,
+            },
+        );
+    }
+
+    /// Remove expired entries from the cache.
+    pub fn cleanup(&self) {
+        let mut cache = self.entries.lock().unwrap();
+        cache.retain(|_, entry| {
+            entry.inserted.elapsed().map(|d| d.as_secs() <= entry.ttl).unwrap_or(true)
+        });
+        debug!("Cache cleanup completed");
+    }
+}
\ No newline at end of file
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..c358675
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,117 @@
+//! Configuration for the DNS server.
+//!
+//! This module defines the configuration structure and methods to load
+//! configuration from environment variables.
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+use std::{env, fs, net::SocketAddr};
+use log::{error, info};
+
+use crate::errors::DnsError;
+
+/// Default TTL for DNS records in seconds.
+pub const DEFAULT_TTL: u64 = 600;
+
+/// Maximum size of DNS packets in bytes.
+pub const MAX_PACKET_SIZE: usize = 4096;
+
+/// Server configuration loaded from environment variables.
+#[derive(Debug, Clone)]
+pub struct ServerConfig {
+    /// Address to bind the DNS server to.
+    pub bind_addr: SocketAddr,
+    
+    /// Path to the SQLite database file.
+    pub db_path: String,
+    
+    /// Time-to-live for cached DNS records.
+    pub cache_ttl: u64,
+    
+    /// Whether to enable IPv6 support.
+    pub enable_ipv6: bool,
+    
+    /// Maximum size of DNS packets.
+    pub max_packet_size: usize,
+    
+    /// Whether this server is authoritative for its zones.
+    pub authoritative: bool,
+    
+    /// List of NS records for zones this server is authoritative for.
+    pub ns_records: Vec<String>,
+    
+    /// Default domain for the server.
+    pub default_domain: String,
+    
+    /// Default IP address for the server.
+    pub default_ip: String,
+    
+    /// List of upstream DNS servers to forward queries to.
+    pub forwarders: Vec<SocketAddr>,
+    
+    /// List of DS records for DNSSEC.
+    pub ds_records: Vec<String>,
+    
+    /// List of DNSKEY records for DNSSEC.
+    pub dnskey_records: Vec<String>,
+}
+
+impl ServerConfig {
+    /// Load server configuration from environment variables.
+    ///
+    /// # Returns
+    /// A `Result` containing either the loaded `ServerConfig` or a `DnsError`.
+    pub fn from_env() -> Result<Self, DnsError> {
+        let bind_addr = env::var("DNS_BIND")
+            .unwrap_or_else(|_| "0.0.0.0:53".into())
+            .parse()
+            .map_err(|_| DnsError::Config("Invalid DNS_BIND address".into()))?;
+
+        let forwarders = env::var("DNS_FORWARDERS")
+            .unwrap_or_else(|_| "8.8.8.8:53,1.1.1.1:53,9.9.9.9:53".into())
+            .split(',')
+            .filter_map(|s| s.trim().parse().ok())
+            .collect();
+
+        let key_path = env::var("DNSSEC_KEY_FILE").unwrap_or_else(|_| "Kbzo.in.+008+24550.key".to_string());
+        let dnskey_records = match fs::read_to_string(&key_path) {
+            Ok(content) => {
+                info!("Loaded DNSSEC key from {}", key_path);
+                vec![content.trim().to_string()]
+            },
+            Err(e) => {
+                error!("Failed to load DNSSEC key from {}: {}", key_path, e);
+                vec![]
+            }
+        };
+
+        Ok(Self {
+            bind_addr,
+            db_path: env::var("DNS_DB_PATH").unwrap_or_else(|_| "dns.db".into()),
+            cache_ttl: env::var("DNS_CACHE_TTL")
+                .ok()
+                .and_then(|v| v.parse().ok())
+                .unwrap_or(DEFAULT_TTL),
+            enable_ipv6: env::var("DNS_ENABLE_IPV6")
+                .map(|v| v == "1" || v.eq_ignore_ascii_case("true"))
+                .unwrap_or(false),
+            max_packet_size: env::var("DNS_MAX_PACKET_SIZE")
+                .ok()
+                .and_then(|v| v.parse().ok())
+                .unwrap_or(MAX_PACKET_SIZE),
+            authoritative: env::var("DNS_AUTHORITATIVE")
+                .map(|v| v == "1" || v.eq_ignore_ascii_case("true"))
+                .unwrap_or(false),
+            ns_records: env::var("DNS_NS_RECORDS")
+                .map(|v| v.split(',').map(|s| s.trim().to_string()).collect())
+                .unwrap_or_else(|_| vec!["ns1.yourdomain.tld.".into(), "ns2.yourdomain.tld.".into()]),
+            default_domain: env::var("DNS_DEFAULT_DOMAIN").unwrap_or_else(|_| "bzo.in".into()),
+            default_ip: env::var("DNS_DEFAULT_IP").unwrap_or_else(|_| "<your-public-ip4-here>".into()),
+            ds_records: vec![
+                "yourdomain.tld. IN DS 24550 8 2 1F21CA282945434EE0662805430599CB2A6C479D9F934087150901CE2DA580A0".to_string()
+            ],
+            dnskey_records,
+            forwarders,
+        })
+    }
+}
\ No newline at end of file
diff --git a/src/db.rs b/src/db.rs
new file mode 100644
index 0000000..0acf875
--- /dev/null
+++ b/src/db.rs
@@ -0,0 +1,224 @@
+//! Database operations for the DNS server.
+//!
+//! This module provides functions for interacting with the SQLite database
+//! that stores DNS records and zone information.
+
+use rusqlite::{params, Connection};
+
+use crate::errors::DnsError;
+use crate::config::ServerConfig;
+
+/// Information about a DNS zone.
+#[derive(Debug, Clone)]
+pub struct ZoneInfo {
+    /// The domain name of the zone.
+    pub name: String,
+    
+    /// List of NS records for the zone.
+    pub ns_records: Vec<String>,
+    
+    /// SOA record for the zone, if available.
+    pub soa_record: Option<String>,
+}
+
+/// Initialize the DNS database.
+///
+/// Creates the database schema if it doesn't exist and populates it with default records
+/// if the database is empty.
+///
+/// # Arguments
+/// * `db_path` - Path to the SQLite database file.
+/// * `default_domain` - Default domain name to use for initial records.
+/// * `default_ip` - Default IP address to use for initial records.
+///
+/// # Returns
+/// A `Result` indicating success or failure.
+pub fn init_db(db_path: &str, default_domain: &str, default_ip: &str) -> Result<(), DnsError> {
+    let conn = Connection::open(db_path)?;
+
+    // Updated schema to allow multiple NS records
+    conn.execute(
+        "CREATE TABLE IF NOT EXISTS dns_records (
+            domain TEXT NOT NULL,
+            record_type TEXT NOT NULL CHECK(record_type IN (
+                'A','AAAA','MX','TXT','NS','CNAME','PTR','SOA',
+                'SRV','CAA','NAPTR','DS','DNSKEY','RRSIG','NSEC',
+                'TLSA','SSHFP'
+            )),
+            value TEXT NOT NULL,
+            ttl INTEGER DEFAULT 3600,
+            PRIMARY KEY (domain, record_type, value)  -- Now allows multiple NS records
+        ) WITHOUT ROWID",
+        [],
+    )?;
+
+    let count: i64 = conn.query_row("SELECT COUNT(*) FROM dns_records", [], |row| row.get(0))?;
+
+    if count == 0 && !default_ip.is_empty() {
+        let mail_domain = format!("mail.{}", default_domain);
+        let ns1 = format!("ns1.{}", default_domain);
+        let ns2 = format!("ns2.{}", default_domain);
+        let soa_record = format!("{} hostmaster.{} 1 10800 3600 604800 86400", ns1, default_domain);
+
+        conn.execute_batch(
+            &format!(
+                r#"
+                INSERT OR IGNORE INTO dns_records VALUES('{0}', 'A', ?, 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('www.{0}', 'A', ?, 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('api.{0}', 'A', ?, 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('mail.{0}', 'A', ?, 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('ns1.{0}', 'A', ?, 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('ns2.{0}', 'A', ?, 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('{0}', 'MX', '10 {1}', 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('{0}', 'TXT', '\"v=spf1 a mx ~all\"', 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('{0}', 'NS', '{2}', 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('{0}', 'NS', '{3}', 3600);
+                INSERT OR IGNORE INTO dns_records VALUES('{0}', 'SOA', '{4}', 3600);
+                "#,
+                default_domain, mail_domain, ns1, ns2, soa_record
+            ),
+        )?;
+    }
+
+    Ok(())
+}
+
+/// Look up DNS records for a domain.
+///
+/// # Arguments
+/// * `db_path` - Path to the SQLite database file.
+/// * `domain` - Domain name to look up.
+///
+/// # Returns
+/// A vector of tuples containing (value, ttl, record_type) for each record found.
+pub fn lookup_records(db_path: &str, domain: &str) -> Vec<(String, u64, String)> {
+    let conn = Connection::open(db_path);
+    match conn {
+        Ok(conn) => {
+            match conn.prepare(
+                "SELECT value, ttl, record_type FROM dns_records WHERE domain = ?"
+            ) {
+                Ok(mut stmt) => {
+                    match stmt.query_map(params![domain], |row| {
+                        Ok((
+                            row.get(0).unwrap_or_default(),
+                            row.get(1).unwrap_or_default(),
+                            row.get(2).unwrap_or_default(),
+                        ))
+                    }) {
+                        Ok(rows) => rows.filter_map(Result::ok).collect(),
+                        Err(_) => Vec::new(),
+                    }
+                }
+                Err(_) => Vec::new(),
+            }
+        }
+        Err(_) => Vec::new(),
+    }
+}
+
+/// Get information about all zones for which this server is authoritative.
+///
+/// # Arguments
+/// * `db_path` - Path to the SQLite database file.
+///
+/// # Returns
+/// A vector of `ZoneInfo` structs containing information about each zone.
+pub fn get_authoritative_zones(db_path: &str) -> Vec<ZoneInfo> {
+    let mut zones = Vec::new();
+
+    if let Ok(conn) = Connection::open(db_path) {
+        // Find all domains with NS records (these are zones)
+        if let Ok(mut stmt) = conn.prepare(
+            "SELECT DISTINCT domain FROM dns_records WHERE record_type = 'NS'"
+        ) {
+            if let Ok(rows) = stmt.query_map([], |row| {
+                Ok(row.get::<_, String>(0)?)
+            }) {
+                for domain_result in rows {
+                    if let Ok(domain) = domain_result {
+                        let mut zone_info = ZoneInfo {
+                            name: domain.clone(),
+                            ns_records: Vec::new(),
+                            soa_record: None,
+                        };
+
+                        // Get NS records for this zone
+                        if let Ok(mut ns_stmt) = conn.prepare(
+                            "SELECT value FROM dns_records WHERE domain = ? AND record_type = 'NS'"
+                        ) {
+                            if let Ok(ns_rows) = ns_stmt.query_map([&domain], |row| {
+                                Ok(row.get::<_, String>(0)?)
+                            }) {
+                                zone_info.ns_records = ns_rows.filter_map(Result::ok).collect();
+                            }
+                        }
+
+                        // Get SOA record if exists
+                        if let Ok(mut soa_stmt) = conn.prepare(
+                            "SELECT value FROM dns_records WHERE domain = ? AND record_type = 'SOA' LIMIT 1"
+                        ) {
+                            if let Ok(mut soa_rows) = soa_stmt.query_map([&domain], |row| {
+                                Ok(row.get::<_, String>(0)?)
+                            }) {
+                                zone_info.soa_record = soa_rows.next().and_then(|r| r.ok());
+                            }
+                        }
+
+                        zones.push(zone_info);
+                    }
+                }
+            }
+        }
+    }
+
+    // Add default zone information from config
+    if zones.is_empty() {
+        if let Ok(config) = ServerConfig::from_env() {
+            let default_zone = ZoneInfo {
+                name: config.default_domain.clone(),
+                ns_records: config.ns_records.clone(),
+                soa_record: Some(format!(
+                    "{} hostmaster.{} 1 10800 3600 604800 86400",
+                    config.ns_records.first().unwrap_or(&String::from("ns1.example.com.")),
+                    config.default_domain
+                )),
+            };
+            zones.push(default_zone);
+        }
+    }
+
+    zones
+}
+
+/// Find the closest parent zone for a given domain.
+///
+/// # Arguments
+/// * `domain` - Domain name to find the parent zone for.
+/// * `zones` - List of zones to search in.
+///
+/// # Returns
+/// An `Option` containing the closest parent zone, if found.
+pub fn find_closest_parent_zone(domain: &str, zones: &[ZoneInfo]) -> Option<ZoneInfo> {
+    let domain_parts: Vec<&str> = domain.split('.').collect();
+
+    // Try progressively shorter parent domains
+    for i in 0..domain_parts.len() {
+        let candidate = domain_parts[i..].join(".");
+
+        // Exact match
+        if let Some(zone) = zones.iter().find(|z| z.name == candidate) {
+            return Some(zone.clone());
+        }
+    }
+
+    // Check if domain is a subdomain of any zone we're authoritative for
+    for zone in zones {
+        if domain.ends_with(&format!(".{}", zone.name)) {
+            return Some(zone.clone());
+        }
+    }
+
+    // If no match found, return None - we are not authoritative for this domain
+    None
+}
\ No newline at end of file
diff --git a/src/dns.rs b/src/dns.rs
new file mode 100644
index 0000000..9216e58
--- /dev/null
+++ b/src/dns.rs
@@ -0,0 +1,1229 @@
+//! DNS protocol implementation.
+//!
+//! This module provides functions for building and parsing DNS messages.
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+use std::net::SocketAddr;
+use std::io;
+use log::info;
+use tokio::net::{TcpStream, UdpSocket};
+use tokio::io::{AsyncReadExt, AsyncWriteExt};
+use base64::Engine;
+
+use crate::errors::DnsError;
+use crate::config::{ServerConfig, DEFAULT_TTL};
+use crate::utils::{encode_dns_name, extract_domain, extract_query_type, has_opt_record, extract_edns_payload_size, extract_do_bit, parse_sig_time};
+use crate::db::{lookup_records, get_authoritative_zones, find_closest_parent_zone};
+use crate::cache::CACHE;
+
+/// Encode a RRSIG record.
+///
+/// # Arguments
+/// * `rrsig_record` - The RRSIG record string.
+/// * `ttl` - Time-to-live in seconds.
+///
+/// # Returns
+/// A `Result` containing the encoded RRSIG record or an error.
+pub fn encode_rrsig_rr(
+    rrsig_record: &str,
+    ttl: u64,
+) -> Result<Vec<u8>, DnsError> {
+    // Example: "bzo.in. 3600 IN RRSIG DNSKEY 8 2 3600 20250601000000 20240501000000 24550 bzo.in. Q3N9z2n...base64..."
+    let parts: Vec<&str> = rrsig_record.split_whitespace().collect();
+    if parts.len() < 10 {
+        return Err(DnsError::Config(format!(
+            "Malformed RRSIG record - expected at least 10 parts, got {}",
+            parts.len()
+        )));
+    }
+
+    let type_covered = match parts[4] {
+        "DNSKEY" => 48u16,
+        "DS" => 43u16,
+        "A" => 1u16,
+        "NS" => 2u16,
+        "SOA" => 6u16,
+        _ => return Err(DnsError::Config(format!("Unsupported type_covered: {}", parts[4]))),
+    };
+    let algorithm = parts[5].parse::<u8>()?;
+    let labels = parts[6].parse::<u8>()?;
+    let orig_ttl = parts[7].parse::<u32>()?;
+    let sig_exp = parse_sig_time(parts[8])?;
+    let sig_inc = parse_sig_time(parts[9])?;
+    let key_tag = parts[10].parse::<u16>()?;
+    let signer_name = parts[11];
+    let signature_b64 = parts[12..].join(""); // join in case signature is split
+
+    // Encode signer_name as DNS name
+    let mut signer_name_wire = Vec::new();
+    for label in signer_name.trim_end_matches('.').split('.') {
+        signer_name_wire.push(label.len() as u8);
+        signer_name_wire.extend_from_slice(label.as_bytes());
+    }
+    signer_name_wire.push(0); // root
+
+    let signature = base64::engine::general_purpose::STANDARD
+        .decode(signature_b64)
+        .map_err(|e| DnsError::Base64(e.to_string()))?;
+
+    let mut rr = Vec::new();
+    rr.extend_from_slice(&[0xc0, 0x0c]); // Name pointer to QNAME
+    rr.extend_from_slice(&[0x00, 0x2e]); // TYPE = RRSIG (46)
+    rr.extend_from_slice(&[0x00, 0x01]); // CLASS = IN
+    rr.extend_from_slice(&(ttl as u32).to_be_bytes());
+
+    // RDATA
+    let mut rdata = Vec::new();
+    rdata.extend_from_slice(&type_covered.to_be_bytes());
+    rdata.push(algorithm);
+    rdata.push(labels);
+    rdata.extend_from_slice(&orig_ttl.to_be_bytes());
+    rdata.extend_from_slice(&sig_exp.to_be_bytes());
+    rdata.extend_from_slice(&sig_inc.to_be_bytes());
+    rdata.extend_from_slice(&key_tag.to_be_bytes());
+    rdata.extend_from_slice(&signer_name_wire);
+    rdata.extend_from_slice(&signature);
+
+    rr.extend_from_slice(&(rdata.len() as u16).to_be_bytes());
+    rr.extend_from_slice(&rdata);
+
+    Ok(rr)
+}
+
+/// Forward a DNS query to upstream resolvers using UDP.
+///
+/// # Arguments
+/// * `forwarder` - The upstream resolver to forward to.
+/// * `query` - The DNS query to forward.
+///
+/// # Returns
+/// A `Result` containing the response or an error.
+pub async fn forward_request_udp(forwarder: SocketAddr, query: &[u8]) -> io::Result<Vec<u8>> {
+    let socket = UdpSocket::bind("0.0.0.0:0").await?;
+    socket.send_to(query, forwarder).await?;
+
+    let mut buf = vec![0u8; 4096];
+    let (size, _) = socket.recv_from(&mut buf).await?;
+    Ok(buf[..size].to_vec())
+}
+
+/// Forward a DNS query to upstream resolvers using TCP.
+///
+/// # Arguments
+/// * `forwarder` - The upstream resolver to forward to.
+/// * `query` - The DNS query to forward.
+///
+/// # Returns
+/// A `Result` containing the response or an error.
+pub async fn forward_request_tcp(forwarder: SocketAddr, query: &[u8]) -> io::Result<Vec<u8>> {
+    // Connect to the forwarder using TCP
+    let mut stream = TcpStream::connect(forwarder).await?;
+
+    // Write the query with a 2-byte length prefix (per DNS over TCP)
+    let query_len = query.len() as u16;
+    stream.write_all(&query_len.to_be_bytes()).await?;
+    stream.write_all(query).await?;
+
+    // Read the 2-byte length prefix of the response
+    let mut len_buf = [0u8; 2];
+    stream.read_exact(&mut len_buf).await?;
+    let resp_len = u16::from_be_bytes(len_buf) as usize;
+
+    // Read the response
+    let mut resp_buf = vec![0u8; resp_len];
+    stream.read_exact(&mut resp_buf).await?;
+
+    Ok(resp_buf)
+}
+
+/// Forward a DNS query to upstream resolvers.
+///
+/// # Arguments
+/// * `query` - The DNS query to forward.
+/// * `forwarders` - List of upstream resolvers to try.
+///
+/// # Returns
+/// An `Option` containing the response if successful.
+pub async fn forward_to_resolvers(query: &[u8], forwarders: &[SocketAddr]) -> Option<Vec<u8>> {
+    for &forwarder in forwarders {
+        info!("Forwarding query to resolver: {}", forwarder);
+        if let Ok(resp) = forward_request_udp(forwarder, query).await {
+            info!("Received response from resolver: {}", forwarder);
+            return Some(resp);
+        }
+    }
+    None
+}
+
+/// Forward a DNS query to upstream resolvers using TCP.
+///
+/// # Arguments
+/// * `query` - The DNS query to forward.
+/// * `forwarders` - List of upstream resolvers to try.
+///
+/// # Returns
+/// An `Option` containing the response if successful.
+pub async fn forward_to_resolvers_tcp(query: &[u8], forwarders: &[SocketAddr]) -> Option<Vec<u8>> {
+    for &forwarder in forwarders {
+        if let Ok(resp) = forward_request_tcp(forwarder, query).await {
+            return Some(resp);
+        }
+    }
+    None
+}
+
+/// Send a DNS response over TCP.
+///
+/// # Arguments
+/// * `stream` - The TCP stream to send the response on.
+/// * `response` - The DNS response to send.
+///
+/// # Returns
+/// A `Result` indicating success or failure.
+pub async fn send_tcp_response(stream: &mut TcpStream, response: &[u8]) -> io::Result<()> {
+    stream.write_all(&(response.len() as u16).to_be_bytes()).await?;
+    stream.write_all(response).await
+}
+
+/// Generate a DNS response for a query.
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `domain` - The domain name from the query.
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` containing the response or an error.
+pub async fn generate_dns_response(
+    query: &[u8],
+    domain: String,
+    config: &ServerConfig,
+) -> Result<Vec<u8>, DnsError> {
+    let query_type = extract_query_type(query).unwrap_or(1);
+
+    // Handle DNSKEY queries first
+    if query_type == 48 {
+        if let Some(dnskey) = config.dnskey_records.first() {
+            return build_dnskey_response(query, dnskey, 3600, config);
+        }
+        return build_nxdomain_response(query, config.authoritative)
+            .ok_or(DnsError::Protocol("No DNSKEY record".into()));
+    }
+
+    // Handle DS queries (type 43)
+    if query_type == 43 {
+        if let Some(ds) = config.ds_records.first() {
+            return build_ds_response(query, ds, 3600, config);
+        }
+        return build_nxdomain_response(query, config.authoritative)
+            .ok_or(DnsError::Protocol("NXDOMAIN".into()));
+    }
+
+    // Check cache for A/AAAA queries
+    if query_type == 1 || query_type == 28 {
+        if let Some((ip, ttl)) = CACHE.get().unwrap().get(&domain) {
+            return build_dns_response(query, &ip, ttl, config);
+        }
+    }
+
+    // Lookup records in database
+    let records = lookup_records(&config.db_path, &domain);
+    let requested_type = match query_type {
+        1 => "A",
+        2 => "NS",
+        5 => "CNAME",
+        6 => "SOA",
+        12 => "PTR",
+        15 => "MX",
+        16 => "TXT",
+        28 => "AAAA",
+        _ => "",
+    };
+
+    // Try exact match first
+    if let Some((value, ttl, _)) = records.iter()
+        .find(|(_, _, rtype)| rtype == requested_type)
+        .cloned()
+    {
+        return match requested_type {
+            "SOA" => build_soa_response(query, &value, ttl, domain, config),
+            "NS" => build_ns_response(query, &records, ttl, domain, config),
+            "MX" | "TXT" | "CNAME" | "PTR" => {
+                build_generic_record_response(query, &value, ttl, domain, query_type, config)
+            },
+            "A" | "AAAA" => {
+                CACHE.get().unwrap().set(domain.clone(), value.clone(), ttl);
+                build_dns_response(query, &value, ttl, config)
+            },
+            _ => Err(DnsError::Protocol("Unsupported record type".into()))
+        };
+    }
+
+    // Fallback for A/AAAA queries
+    if query_type == 1 || query_type == 28 {
+        if let Some((ip, ttl, _)) = records.iter()
+            .find(|(_, _, rtype)| rtype == "A")
+            .cloned()
+        {
+            CACHE.get().unwrap().set(domain.clone(), ip.clone(), ttl);
+            return build_dns_response(query, &ip, ttl, config);
+        }
+    }
+
+    // If we're authoritative for this domain, return NXDOMAIN
+    let zones = get_authoritative_zones(&config.db_path);
+    if config.authoritative && find_closest_parent_zone(&domain, &zones).is_some() {
+        return build_nxdomain_response(query, true)
+            .ok_or(DnsError::Protocol("NXDOMAIN".into()));
+    }
+
+    // Forward to upstream resolvers
+    if let Some(response) = forward_to_resolvers(query, &config.forwarders).await {
+        Ok(response)
+    } else if let Some(response) = forward_to_resolvers_tcp(query, &config.forwarders).await {
+        Ok(response)
+    } else {
+        Err(DnsError::Protocol("Failed to resolve domain".into()))
+    }
+}
+
+/// Build a DNS response for an A or AAAA record.
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `ip` - The IP address for the response.
+/// * `ttl` - Time-to-live in seconds.
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` containing the response or an error.
+pub fn build_dns_response(
+    query: &[u8],
+    ip: &str,
+    ttl: u64,
+    config: &ServerConfig,
+) -> Result<Vec<u8>, DnsError> {
+    let mut response = Vec::with_capacity(512);
+
+    // Copy transaction ID and question from query
+    response.extend_from_slice(&query[..2]);
+
+    // Set flags
+    // QR = 1 (response)
+    // OPCODE = 0 (standard query)
+    // AA = 1 if authoritative
+    // TC = 0 (not truncated)
+    // RD = copy from query
+    // RA = 1 (recursion available)
+    // Z = 0
+    // RCODE = 0 (no error)
+    let flags1 = 0x80 | (query[2] & 0x01); // Set QR and preserve RD
+    let flags2 = 0x80; // Set RA
+
+    response.extend_from_slice(&[
+        if config.authoritative { flags1 | 0x04 } else { flags1 }, // Set AA if authoritative
+        flags2,
+    ]);
+
+    // Copy QDCOUNT from query
+    response.extend_from_slice(&query[4..6]);
+
+    // Set ANCOUNT to 1
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // Set NSCOUNT (2 if authoritative, else 0)
+    response.extend_from_slice(&[0x00, if config.authoritative { 0x02 } else { 0x00 }]);
+
+    // Set ARCOUNT to 0
+    response.extend_from_slice(&[0x00, 0x00]);
+
+    // Copy question section from query
+    let qname_end = query[12..].iter().position(|&b| b == 0)
+        .ok_or_else(|| DnsError::Protocol("Invalid question format".into()))? + 13;
+    response.extend_from_slice(&query[12..qname_end + 4]);
+
+    // Add answer section
+    // Name pointer to question
+    response.extend_from_slice(&[0xc0, 0x0c]);
+
+    // Type A (0x0001)
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // Class IN (0x0001)
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // TTL
+    response.extend_from_slice(&(ttl as u32).to_be_bytes());
+
+    // Parse IP address
+    let octets: Vec<u8> = ip.split('.')
+        .filter_map(|s| s.parse::<u8>().ok())
+        .collect();
+
+    if octets.len() != 4 {
+        return Err(DnsError::Protocol(format!("Invalid IPv4 address: {}", ip)));
+    }
+
+    // RDLENGTH (4 for IPv4)
+    response.extend_from_slice(&[0x00, 0x04]);
+
+    // RDATA (IP address)
+    response.extend_from_slice(&octets);
+
+    // Add EDNS record if present in query
+    if has_opt_record(query) {
+        let opt_payload_size = extract_edns_payload_size(query).unwrap_or(4096);
+        let do_bit = extract_do_bit(query);
+
+        // Add OPT record
+        response.extend_from_slice(&[0x00]); // Root domain
+        response.extend_from_slice(&[0x00, 0x29]); // TYPE OPT
+        response.extend_from_slice(&opt_payload_size.to_be_bytes()); // UDP payload size
+        response.extend_from_slice(&[0x00]); // Extended RCODE
+        response.extend_from_slice(&[0x00]); // EDNS version
+
+        if do_bit {
+            response.extend_from_slice(&[0x80, 0x00]); // Flags with DO bit set
+        } else {
+            response.extend_from_slice(&[0x00, 0x00]); // Flags with DO bit clear
+        }
+
+        response.extend_from_slice(&[0x00, 0x00]); // RDATA length
+    }
+
+    Ok(response)
+}
+
+/// Build a DNS response for a DS record.
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `ds_record` - The DS record string.
+/// * `ttl` - Time-to-live in seconds.
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` containing the response or an error.
+pub fn build_ds_response(
+    query: &[u8],
+    ds_record: &str,
+    ttl: u64,
+    config: &ServerConfig,
+) -> Result<Vec<u8>, DnsError> {
+    let mut response = Vec::with_capacity(512);
+
+    // Copy transaction ID and question from query
+    response.extend_from_slice(&query[..2]);
+
+    // Set flags
+    let flags1 = 0x84; // QR=1, AA=1, RD=0
+    let flags2 = 0x00; // RA=0, Z=0, RCODE=0
+
+    response.extend_from_slice(&[flags1, flags2]);
+
+    // Copy QDCOUNT from query
+    response.extend_from_slice(&query[4..6]);
+
+    // Set ANCOUNT to 1
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // Set NSCOUNT to 0
+    response.extend_from_slice(&[0x00, 0x00]);
+
+    // Set ARCOUNT to 1 if EDNS is present
+    let has_edns = has_opt_record(query);
+    response.extend_from_slice(&[0x00, if has_edns { 0x01 } else { 0x00 }]);
+
+    // Copy question section from query
+    let qname_end = query[12..].iter().position(|&b| b == 0)
+        .ok_or_else(|| DnsError::Protocol("Invalid question format".into()))? + 13;
+    response.extend_from_slice(&query[12..qname_end + 4]);
+
+    // Parse DS record
+    // Format: "yourdomain.tld. IN DS 24550 8 2 1F21CA282945434EE0662805430599CB2A6C479D9F934087150901CE2DA580A0"
+    let parts: Vec<&str> = ds_record.split_whitespace().collect();
+    if parts.len() < 7 {
+        return Err(DnsError::Config(format!("Invalid DS record format: {}", ds_record)));
+    }
+
+    let key_tag = parts[3].parse::<u16>()
+        .map_err(|_| DnsError::Config(format!("Invalid key tag: {}", parts[3])))?;
+    let algorithm = parts[4].parse::<u8>()
+        .map_err(|_| DnsError::Config(format!("Invalid algorithm: {}", parts[4])))?;
+    let digest_type = parts[5].parse::<u8>()
+        .map_err(|_| DnsError::Config(format!("Invalid digest type: {}", parts[5])))?;
+    let digest = hex::decode(parts[6])
+        .map_err(|_| DnsError::Config(format!("Invalid digest: {}", parts[6])))?;
+
+    // Add answer section
+    // Name pointer to question
+    response.extend_from_slice(&[0xc0, 0x0c]);
+
+    // Type DS (0x002B)
+    response.extend_from_slice(&[0x00, 0x2B]);
+
+    // Class IN (0x0001)
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // TTL
+    response.extend_from_slice(&(ttl as u32).to_be_bytes());
+
+    // RDLENGTH
+    let rdlength = 4 + digest.len(); // 2 + 1 + 1 + digest.len()
+    response.extend_from_slice(&(rdlength as u16).to_be_bytes());
+
+    // RDATA
+    response.extend_from_slice(&key_tag.to_be_bytes());
+    response.push(algorithm);
+    response.push(digest_type);
+    response.extend_from_slice(&digest);
+
+    // Add EDNS record if present in query
+    if has_edns {
+        let opt_payload_size = extract_edns_payload_size(query).unwrap_or(4096);
+        let do_bit = extract_do_bit(query);
+
+        // Add OPT record
+        response.extend_from_slice(&[0x00]); // Root domain
+        response.extend_from_slice(&[0x00, 0x29]); // TYPE OPT
+        response.extend_from_slice(&opt_payload_size.to_be_bytes()); // UDP payload size
+        response.extend_from_slice(&[0x00]); // Extended RCODE
+        response.extend_from_slice(&[0x00]); // EDNS version
+
+        if do_bit {
+            response.extend_from_slice(&[0x80, 0x00]); // Flags with DO bit set
+        } else {
+            response.extend_from_slice(&[0x00, 0x00]); // Flags with DO bit clear
+        }
+
+        response.extend_from_slice(&[0x00, 0x00]); // RDATA length
+    }
+
+    Ok(response)
+}
+
+/// Build a DNS response for a DNSKEY record.
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `dnskey_record` - The DNSKEY record string.
+/// * `ttl` - Time-to-live in seconds.
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` containing the response or an error.
+pub fn build_dnskey_response(
+    query: &[u8],
+    dnskey_record: &str,
+    ttl: u64,
+    config: &ServerConfig,
+) -> Result<Vec<u8>, DnsError> {
+    let mut response = Vec::with_capacity(512);
+
+    // Copy transaction ID and question from query
+    response.extend_from_slice(&query[..2]);
+
+    // Set flags
+    let flags1 = 0x84; // QR=1, AA=1, RD=0
+    let flags2 = 0x00; // RA=0, Z=0, RCODE=0
+
+    response.extend_from_slice(&[flags1, flags2]);
+
+    // Copy QDCOUNT from query
+    response.extend_from_slice(&query[4..6]);
+
+    // Set ANCOUNT to 1
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // Set NSCOUNT to 0
+    response.extend_from_slice(&[0x00, 0x00]);
+
+    // Set ARCOUNT to 1 if EDNS is present, 0 otherwise
+    let has_edns = has_opt_record(query);
+    response.extend_from_slice(&[0x00, if has_edns { 0x01 } else { 0x00 }]);
+
+    // Copy question section from query
+    let qname_end = query[12..].iter().position(|&b| b == 0)
+        .ok_or_else(|| DnsError::Protocol("Invalid question format".into()))? + 13;
+    response.extend_from_slice(&query[12..qname_end + 4]);
+
+    // Parse DNSKEY record
+    // Format: "yourdomain.tld. IN DNSKEY 256 3 8 AwEAAb/xrM..."
+    let parts: Vec<&str> = dnskey_record.split_whitespace().collect();
+    if parts.len() < 7 {
+        return Err(DnsError::Config(format!("Invalid DNSKEY record format: {}", dnskey_record)));
+    }
+
+    let flags = parts[3].parse::<u16>()
+        .map_err(|_| DnsError::Config(format!("Invalid flags: {}", parts[3])))?;
+    let protocol = parts[4].parse::<u8>()
+        .map_err(|_| DnsError::Config(format!("Invalid protocol: {}", parts[4])))?;
+    let algorithm = parts[5].parse::<u8>()
+        .map_err(|_| DnsError::Config(format!("Invalid algorithm: {}", parts[5])))?;
+    let public_key = parts[6..].join("");
+
+    // Decode base64 public key
+    let key_data = base64::engine::general_purpose::STANDARD
+        .decode(&public_key)
+        .map_err(|e| DnsError::Base64(e.to_string()))?;
+
+    // Add answer section
+    // Name pointer to question
+    response.extend_from_slice(&[0xc0, 0x0c]);
+
+    // Type DNSKEY (0x0030)
+    response.extend_from_slice(&[0x00, 0x30]);
+
+    // Class IN (0x0001)
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // TTL
+    response.extend_from_slice(&(ttl as u32).to_be_bytes());
+
+    // RDLENGTH
+    let rdlength = 4 + key_data.len(); // 2 + 1 + 1 + key_data.len()
+    response.extend_from_slice(&(rdlength as u16).to_be_bytes());
+
+    // RDATA
+    response.extend_from_slice(&flags.to_be_bytes());
+    response.push(protocol);
+    response.push(algorithm);
+    response.extend_from_slice(&key_data);
+
+    // Add EDNS record if present in query
+    if has_edns {
+        let opt_payload_size = extract_edns_payload_size(query).unwrap_or(4096);
+        let do_bit = extract_do_bit(query);
+
+        // Add OPT record
+        response.extend_from_slice(&[0x00]); // Root domain
+        response.extend_from_slice(&[0x00, 0x29]); // TYPE OPT
+        response.extend_from_slice(&opt_payload_size.to_be_bytes()); // UDP payload size
+        response.extend_from_slice(&[0x00]); // Extended RCODE
+        response.extend_from_slice(&[0x00]); // EDNS version
+
+        if do_bit {
+            response.extend_from_slice(&[0x80, 0x00]); // Flags with DO bit set
+        } else {
+            response.extend_from_slice(&[0x00, 0x00]); // Flags with DO bit clear
+        }
+
+        response.extend_from_slice(&[0x00, 0x00]); // RDATA length
+    }
+
+    Ok(response)
+}
+
+/// Build a DNS response for a SOA record.
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `soa_value` - The SOA record string.
+/// * `ttl` - Time-to-live in seconds.
+/// * `domain` - The domain name from the query.
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` containing the response or an error.
+pub fn build_soa_response(
+    query: &[u8],
+    soa_value: &str,
+    ttl: u64,
+    domain: String,
+    config: &ServerConfig,
+) -> Result<Vec<u8>, DnsError> {
+    let mut response = Vec::with_capacity(512);
+
+    // Copy transaction ID and question from query
+    response.extend_from_slice(&query[..2]);
+
+    // Set flags
+    let flags1 = 0x84; // QR=1, AA=1, RD=0
+    let flags2 = 0x00; // RA=0, Z=0, RCODE=0
+
+    response.extend_from_slice(&[flags1, flags2]);
+
+    // Copy QDCOUNT from query
+    response.extend_from_slice(&query[4..6]);
+
+    // Set ANCOUNT to 1
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // Set NSCOUNT to 0
+    response.extend_from_slice(&[0x00, 0x00]);
+
+    // Set ARCOUNT to 1 if EDNS is present, 0 otherwise
+    let has_edns = has_opt_record(query);
+    response.extend_from_slice(&[0x00, if has_edns { 0x01 } else { 0x00 }]);
+
+    // Copy question section from query
+    let qname_end = query[12..].iter().position(|&b| b == 0)
+        .ok_or_else(|| DnsError::Protocol("Invalid question format".into()))? + 13;
+    response.extend_from_slice(&query[12..qname_end + 4]);
+
+    // Parse SOA record
+    // Format: "ns1.example.com. hostmaster.example.com. 1 10800 3600 604800 86400"
+    let parts: Vec<&str> = soa_value.split_whitespace().collect();
+    if parts.len() < 7 {
+        return Err(DnsError::Config(format!("Invalid SOA record format: {}", soa_value)));
+    }
+
+    let mname = parts[0]; // Primary nameserver
+    let rname = parts[1]; // Hostmaster email
+    let serial = parts[2].parse::<u32>()
+        .map_err(|_| DnsError::Config(format!("Invalid serial: {}", parts[2])))?;
+    let refresh = parts[3].parse::<u32>()
+        .map_err(|_| DnsError::Config(format!("Invalid refresh: {}", parts[3])))?;
+    let retry = parts[4].parse::<u32>()
+        .map_err(|_| DnsError::Config(format!("Invalid retry: {}", parts[4])))?;
+    let expire = parts[5].parse::<u32>()
+        .map_err(|_| DnsError::Config(format!("Invalid expire: {}", parts[5])))?;
+    let minimum = parts[6].parse::<u32>()
+        .map_err(|_| DnsError::Config(format!("Invalid minimum: {}", parts[6])))?;
+
+    // Add answer section
+    // Name pointer to question
+    response.extend_from_slice(&[0xc0, 0x0c]);
+
+    // Type SOA (0x0006)
+    response.extend_from_slice(&[0x00, 0x06]);
+
+    // Class IN (0x0001)
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // TTL
+    response.extend_from_slice(&(ttl as u32).to_be_bytes());
+
+    // Encode MNAME and RNAME
+    let mname_wire = encode_dns_name(mname);
+    let rname_wire = encode_dns_name(rname);
+
+    // RDLENGTH
+    let rdlength = mname_wire.len() + rname_wire.len() + 20; // 5 32-bit integers
+    response.extend_from_slice(&(rdlength as u16).to_be_bytes());
+
+    // RDATA
+    response.extend_from_slice(&mname_wire);
+    response.extend_from_slice(&rname_wire);
+    response.extend_from_slice(&serial.to_be_bytes());
+    response.extend_from_slice(&refresh.to_be_bytes());
+    response.extend_from_slice(&retry.to_be_bytes());
+    response.extend_from_slice(&expire.to_be_bytes());
+    response.extend_from_slice(&minimum.to_be_bytes());
+
+    // Add EDNS record if present in query
+    if has_edns {
+        let opt_payload_size = extract_edns_payload_size(query).unwrap_or(4096);
+        let do_bit = extract_do_bit(query);
+
+        // Add OPT record
+        response.extend_from_slice(&[0x00]); // Root domain
+        response.extend_from_slice(&[0x00, 0x29]); // TYPE OPT
+        response.extend_from_slice(&opt_payload_size.to_be_bytes()); // UDP payload size
+        response.extend_from_slice(&[0x00]); // Extended RCODE
+        response.extend_from_slice(&[0x00]); // EDNS version
+
+        if do_bit {
+            response.extend_from_slice(&[0x80, 0x00]); // Flags with DO bit set
+        } else {
+            response.extend_from_slice(&[0x00, 0x00]); // Flags with DO bit clear
+        }
+
+        response.extend_from_slice(&[0x00, 0x00]); // RDATA length
+    }
+
+    Ok(response)
+}
+
+/// Build a DNS response for NS records.
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `records` - The DNS records for the domain.
+/// * `ttl` - Time-to-live in seconds.
+/// * `domain` - The domain name from the query.
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` containing the response or an error.
+pub fn build_ns_response(
+    query: &[u8],
+    records: &[(String, u64, String)],
+    ttl: u64,
+    domain: String,
+    config: &ServerConfig,
+) -> Result<Vec<u8>, DnsError> {
+    let mut response = Vec::with_capacity(512);
+
+    // Copy transaction ID and question from query
+    response.extend_from_slice(&query[..2]);
+
+    // Set flags
+    let flags1 = 0x84; // QR=1, AA=1, RD=0
+    let flags2 = 0x00; // RA=0, Z=0, RCODE=0
+
+    response.extend_from_slice(&[flags1, flags2]);
+
+    // Copy QDCOUNT from query
+    response.extend_from_slice(&query[4..6]);
+
+    // Count NS records
+    let ns_records: Vec<&(String, u64, String)> = records.iter()
+        .filter(|(_, _, rtype)| rtype == "NS")
+        .collect();
+
+    // Set ANCOUNT to number of NS records
+    response.extend_from_slice(&(ns_records.len() as u16).to_be_bytes());
+
+    // Set NSCOUNT to 0
+    response.extend_from_slice(&[0x00, 0x00]);
+
+    // Set ARCOUNT to 1 if EDNS is present, 0 otherwise
+    let has_edns = has_opt_record(query);
+    response.extend_from_slice(&[0x00, if has_edns { 0x01 } else { 0x00 }]);
+
+    // Copy question section from query
+    let qname_end = query[12..].iter().position(|&b| b == 0)
+        .ok_or_else(|| DnsError::Protocol("Invalid question format".into()))? + 13;
+    response.extend_from_slice(&query[12..qname_end + 4]);
+
+    // Add answer section for each NS record
+    for (ns_value, ns_ttl, _) in ns_records {
+        // Name pointer to question
+        response.extend_from_slice(&[0xc0, 0x0c]);
+
+        // Type NS (0x0002)
+        response.extend_from_slice(&[0x00, 0x02]);
+
+        // Class IN (0x0001)
+        response.extend_from_slice(&[0x00, 0x01]);
+
+        // TTL
+        response.extend_from_slice(&(*ns_ttl as u32).to_be_bytes());
+
+        // Encode NS name
+        let ns_data = encode_dns_name(ns_value);
+
+        // RDLENGTH
+        response.extend_from_slice(&(ns_data.len() as u16).to_be_bytes());
+
+        // RDATA (NS name)
+        response.extend_from_slice(&ns_data);
+    }
+
+    // Add EDNS record if present in query
+    if has_edns {
+        let opt_payload_size = extract_edns_payload_size(query).unwrap_or(4096);
+        let do_bit = extract_do_bit(query);
+
+        // Add OPT record
+        response.extend_from_slice(&[0x00]); // Root domain
+        response.extend_from_slice(&[0x00, 0x29]); // TYPE OPT
+        response.extend_from_slice(&opt_payload_size.to_be_bytes()); // UDP payload size
+        response.extend_from_slice(&[0x00]); // Extended RCODE
+        response.extend_from_slice(&[0x00]); // EDNS version
+
+        if do_bit {
+            response.extend_from_slice(&[0x80, 0x00]); // Flags with DO bit set
+        } else {
+            response.extend_from_slice(&[0x00, 0x00]); // Flags with DO bit clear
+        }
+
+        response.extend_from_slice(&[0x00, 0x00]); // RDATA length
+    }
+
+    Ok(response)
+}
+
+/// Build a DNS response for generic record types (MX, TXT, CNAME, PTR).
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `value` - The record value.
+/// * `ttl` - Time-to-live in seconds.
+/// * `domain` - The domain name from the query.
+/// * `query_type` - The query type.
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` containing the response or an error.
+pub fn build_generic_record_response(
+    query: &[u8],
+    value: &str,
+    ttl: u64,
+    domain: String,
+    query_type: u16,
+    config: &ServerConfig,
+) -> Result<Vec<u8>, DnsError> {
+    let mut response = Vec::with_capacity(512);
+
+    // Copy transaction ID and question from query
+    response.extend_from_slice(&query[..2]);
+
+    // Set flags
+    let flags1 = 0x84; // QR=1, AA=1, RD=0
+    let flags2 = 0x00; // RA=0, Z=0, RCODE=0
+
+    response.extend_from_slice(&[flags1, flags2]);
+
+    // Copy QDCOUNT from query
+    response.extend_from_slice(&query[4..6]);
+
+    // Set ANCOUNT to 1
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // Set NSCOUNT to 0
+    response.extend_from_slice(&[0x00, 0x00]);
+
+    // Set ARCOUNT to 1 if EDNS is present, 0 otherwise
+    let has_edns = has_opt_record(query);
+    response.extend_from_slice(&[0x00, if has_edns { 0x01 } else { 0x00 }]);
+
+    // Copy question section from query
+    let qname_end = query[12..].iter().position(|&b| b == 0)
+        .ok_or_else(|| DnsError::Protocol("Invalid question format".into()))? + 13;
+    response.extend_from_slice(&query[12..qname_end + 4]);
+
+    // Add answer section
+    // Name pointer to question
+    response.extend_from_slice(&[0xc0, 0x0c]);
+
+    // Type
+    response.extend_from_slice(&query_type.to_be_bytes());
+
+    // Class IN (0x0001)
+    response.extend_from_slice(&[0x00, 0x01]);
+
+    // TTL
+    response.extend_from_slice(&(ttl as u32).to_be_bytes());
+
+    // RDATA depends on record type
+    match query_type {
+        // MX record
+        15 => {
+            // Parse MX record: "10 mail.example.com."
+            let parts: Vec<&str> = value.split_whitespace().collect();
+            if parts.len() < 2 {
+                return Err(DnsError::Config(format!("Invalid MX record format: {}", value)));
+            }
+
+            let preference = parts[0].parse::<u16>()
+                .map_err(|_| DnsError::Config(format!("Invalid MX preference: {}", parts[0])))?;
+            let exchange = parts[1];
+
+            // Encode exchange name
+            let exchange_wire = encode_dns_name(exchange);
+
+            // RDLENGTH
+            let rdlength = 2 + exchange_wire.len(); // preference + exchange
+            response.extend_from_slice(&(rdlength as u16).to_be_bytes());
+
+            // RDATA
+            response.extend_from_slice(&preference.to_be_bytes());
+            response.extend_from_slice(&exchange_wire);
+        },
+
+        // TXT record
+        16 => {
+            // Remove quotes if present
+            let txt_value = value.trim_matches('"');
+
+            // RDLENGTH
+            let rdlength = txt_value.len() + 1; // length byte + text
+            response.extend_from_slice(&(rdlength as u16).to_be_bytes());
+
+            // RDATA
+            response.push(txt_value.len() as u8);
+            response.extend_from_slice(txt_value.as_bytes());
+        },
+
+        // CNAME or PTR record
+        5 | 12 => {
+            // Encode target name
+            let target_wire = encode_dns_name(value);
+
+            // RDLENGTH
+            response.extend_from_slice(&(target_wire.len() as u16).to_be_bytes());
+
+            // RDATA
+            response.extend_from_slice(&target_wire);
+        },
+
+        _ => return Err(DnsError::Protocol(format!("Unsupported record type: {}", query_type))),
+    }
+
+    // Add EDNS record if present in query
+    if has_edns {
+        let opt_payload_size = extract_edns_payload_size(query).unwrap_or(4096);
+        let do_bit = extract_do_bit(query);
+
+        // Add OPT record
+        response.extend_from_slice(&[0x00]); // Root domain
+        response.extend_from_slice(&[0x00, 0x29]); // TYPE OPT
+        response.extend_from_slice(&opt_payload_size.to_be_bytes()); // UDP payload size
+        response.extend_from_slice(&[0x00]); // Extended RCODE
+        response.extend_from_slice(&[0x00]); // EDNS version
+
+        if do_bit {
+            response.extend_from_slice(&[0x80, 0x00]); // Flags with DO bit set
+        } else {
+            response.extend_from_slice(&[0x00, 0x00]); // Flags with DO bit clear
+        }
+
+        response.extend_from_slice(&[0x00, 0x00]); // RDATA length
+    }
+
+    Ok(response)
+}
+
+/// Build a DNS response for a "not implemented" error.
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `authoritative` - Whether this server is authoritative for the domain.
+///
+/// # Returns
+/// An `Option` containing the response if successful.
+pub fn build_not_implemented_response(query: &[u8], authoritative: bool) -> Option<Vec<u8>> {
+    if query.len() < 12 {
+        return None;
+    }
+
+    let mut resp = Vec::with_capacity(512);
+
+    // Copy transaction ID from query
+    resp.extend_from_slice(&query[0..2]);
+
+    // Set flags
+    // QR = 1 (response)
+    // OPCODE = copy from query
+    // AA = 0 or 1 depending on authoritative
+    // TC = 0 (not truncated)
+    // RD = copy from query
+    // RA = 1 (recursion available)
+    // Z = 0
+    // RCODE = 4 (not implemented)
+    let opcode = query[2] & 0x78; // Extract OPCODE
+    let rd = query[2] & 0x01; // Extract RD
+    let flags1 = 0x80 | opcode | rd; // QR=1, OPCODE=opcode, RD=rd
+    let flags2 = 0x84; // RA=1, RCODE=4 (not implemented)
+
+    resp.extend_from_slice(&[
+        if authoritative { flags1 | 0x04 } else { flags1 }, // Set AA if authoritative
+        flags2,
+    ]);
+
+    // Copy QDCOUNT from query
+    resp.extend_from_slice(&query[4..6]);
+
+    // Set ANCOUNT, NSCOUNT, ARCOUNT to 0
+    resp.extend_from_slice(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
+
+    // Copy question section from query
+    let mut pos = 12;
+    loop {
+        if pos >= query.len() {
+            return None;
+        }
+        let len = query[pos] as usize;
+        if len == 0 {
+            // End of domain name
+            pos += 1;
+            break;
+        }
+        pos += len + 1;
+    }
+
+    // Include QTYPE and QCLASS (4 bytes)
+    if pos + 4 > query.len() {
+        return None;
+    }
+    pos += 4;
+
+    // Copy question section
+    resp.extend_from_slice(&query[12..pos]);
+
+    // Check for EDNS
+    let has_edns = has_opt_record(query);
+    if has_edns {
+        let opt_payload_size = extract_edns_payload_size(query).unwrap_or(4096);
+        let do_bit = extract_do_bit(query);
+
+        // Add OPT record
+        resp.extend_from_slice(&[0x00]); // Root domain
+        resp.extend_from_slice(&[0x00, 0x29]); // TYPE OPT
+        resp.extend_from_slice(&opt_payload_size.to_be_bytes()); // UDP payload size
+        resp.extend_from_slice(&[0x00]); // Extended RCODE
+        resp.extend_from_slice(&[0x00]); // EDNS version
+
+        if do_bit {
+            resp.extend_from_slice(&[0x80, 0x00]); // Flags with DO bit set
+        } else {
+            resp.extend_from_slice(&[0x00, 0x00]); // Flags with DO bit clear
+        }
+
+        resp.extend_from_slice(&[0x00, 0x00]); // RDATA length
+    }
+
+    Some(resp)
+}
+
+/// Build a DNS response for a "name error" (NXDOMAIN).
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `authoritative` - Whether this server is authoritative for the domain.
+///
+/// # Returns
+/// An `Option` containing the response if successful.
+pub fn build_nxdomain_response(query: &[u8], authoritative: bool) -> Option<Vec<u8>> {
+    let mut resp = Vec::with_capacity(512);
+    resp.extend_from_slice(&query[0..2]); // Transaction ID
+
+    // Extract domain from query for authority section reference
+    let domain = match extract_domain(query) {
+        Some(d) => d,
+        None => return None,
+    };
+
+    // Get zones we're authoritative for
+    let config = match ServerConfig::from_env() {
+        Ok(c) => c,
+        Err(_) => return None,
+    };
+
+    // Get authoritative zones
+    let zones = get_authoritative_zones(&config.db_path);
+    let zone = find_closest_parent_zone(&domain, &zones);
+
+    // Set flags
+    // QR = 1 (response)
+    // OPCODE = 0 (standard query)
+    // AA = 1 if authoritative
+    // TC = 0 (not truncated)
+    // RD = copy from query
+    // RA = 1 (recursion available)
+    // Z = 0
+    // RCODE = 3 (name error)
+    let rd = query[2] & 0x01; // Extract RD
+    let flags1 = 0x80 | rd; // QR=1, RD=rd
+    let flags2 = 0x83; // RA=1, RCODE=3 (name error)
+
+    resp.extend_from_slice(&[
+        if authoritative { flags1 | 0x04 } else { flags1 }, // Set AA if authoritative
+        flags2,
+    ]);
+
+    // Copy QDCOUNT from query
+    resp.extend_from_slice(&query[4..6]);
+
+    // Set ANCOUNT to 0
+    resp.extend_from_slice(&[0x00, 0x00]);
+
+    // Set NSCOUNT to 1 if we have a zone, 0 otherwise
+    resp.extend_from_slice(&[0x00, if zone.is_some() { 0x01 } else { 0x00 }]);
+
+    // Check for EDNS
+    let has_edns = has_opt_record(query);
+
+    // Set ARCOUNT to 1 if EDNS, 0 otherwise
+    resp.extend_from_slice(&[0x00, if has_edns { 0x01 } else { 0x00 }]);
+
+    // Copy question section from query
+    let qname_end = match query[12..].iter().position(|&b| b == 0) {
+        Some(pos) => pos + 13,
+        None => return None,
+    };
+    resp.extend_from_slice(&query[12..qname_end + 4]);
+
+    // Add authority section if we have a zone
+    if let Some(zone) = zone {
+        // Add SOA record
+        let zone_name = encode_dns_name(&zone.name);
+        resp.extend_from_slice(&zone_name);
+
+        // Type SOA (0x0006)
+        resp.extend_from_slice(&[0x00, 0x06]);
+
+        // Class IN (0x0001)
+        resp.extend_from_slice(&[0x00, 0x01]);
+
+        // TTL
+        resp.extend_from_slice(&(DEFAULT_TTL as u32).to_be_bytes());
+
+        // RDATA
+        if let Some(soa) = zone.soa_record {
+            // Parse SOA record
+            let parts: Vec<&str> = soa.split_whitespace().collect();
+            if parts.len() >= 7 {
+                let mname = parts[0];
+                let rname = parts[1];
+
+                // Encode MNAME and RNAME
+                let mname_wire = encode_dns_name(mname);
+                let rname_wire = encode_dns_name(rname);
+
+                // RDLENGTH
+                let rdlength = mname_wire.len() + rname_wire.len() + 20; // 5 32-bit integers
+                resp.extend_from_slice(&(rdlength as u16).to_be_bytes());
+
+                // RDATA
+                resp.extend_from_slice(&mname_wire);
+                resp.extend_from_slice(&rname_wire);
+
+                // SOA integers with reasonable defaults
+                resp.extend_from_slice(&1u32.to_be_bytes()); // SERIAL
+                resp.extend_from_slice(&10800u32.to_be_bytes()); // REFRESH
+                resp.extend_from_slice(&3600u32.to_be_bytes()); // RETRY
+                resp.extend_from_slice(&604800u32.to_be_bytes()); // EXPIRE
+                resp.extend_from_slice(&86400u32.to_be_bytes()); // MINIMUM
+            }
+        }
+
+        // Add NS records
+        for ns in &zone.ns_records {
+            // Name of the zone
+            resp.extend_from_slice(&zone_name);
+
+            // Type NS (0x0002)
+            resp.extend_from_slice(&[0x00, 0x02]);
+
+            // Class IN (0x0001)
+            resp.extend_from_slice(&[0x00, 0x01]);
+
+            // TTL
+            resp.extend_from_slice(&(DEFAULT_TTL as u32).to_be_bytes());
+
+            // RDLENGTH and RDATA (NS name)
+            let ns_data = encode_dns_name(ns);
+            resp.extend_from_slice(&(ns_data.len() as u16).to_be_bytes());
+            resp.extend_from_slice(&ns_data);
+        }
+    }
+
+    // Handle EDNS in NXDOMAIN response
+    if has_edns {
+        let opt_payload_size = extract_edns_payload_size(query).unwrap_or(4096);
+
+        // Copy DO bit if present in request
+        let do_bit = extract_do_bit(query);
+
+        // Add OPT record for EDNS
+        resp.extend_from_slice(&[0x00]); // Root domain
+        resp.extend_from_slice(&[0x00, 0x29]); // TYPE OPT
+        resp.extend_from_slice(&opt_payload_size.to_be_bytes()); // UDP payload size from request
+        resp.extend_from_slice(&[0x00]); // Extended RCODE
+        resp.extend_from_slice(&[0x00]); // EDNS version
+
+        if do_bit {
+            resp.extend_from_slice(&[0x80, 0x00]); // Flags with DO bit set
+        } else {
+            resp.extend_from_slice(&[0x00, 0x00]); // Flags with DO bit clear
+        }
+
+        resp.extend_from_slice(&[0x00, 0x00]); // RDATA length
+    }
+
+    Some(resp)
+}
\ No newline at end of file
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..819404d
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,39 @@
+//! Error types for the DNS server
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+use std::io;
+use rusqlite;
+use thiserror::Error;
+
+/// Errors that can occur in the DNS server
+#[derive(Debug, Error)]
+pub enum DnsError {
+    /// I/O errors from the underlying system
+    #[error("I/O error: {0}")]
+    Io(#[from] io::Error),
+    
+    /// Database errors from SQLite operations
+    #[error("Database error: {0}")]
+    Db(#[from] rusqlite::Error),
+    
+    /// Protocol errors related to DNS message format or content
+    #[error("Protocol error: {0}")]
+    Protocol(String),
+    
+    /// Configuration errors from invalid settings
+    #[error("Configuration error: {0}")]
+    Config(String),
+    
+    /// Parse errors from string to number conversions
+    #[error("Parse error: {0}")]
+    Parse(#[from] std::num::ParseIntError),
+    
+    /// Base64 decoding errors
+    #[error("Base64 error: {0}")]
+    Base64(String),
+    
+    /// Shutdown signal received
+    #[error("Shutdown signal received")]
+    Shutdown,
+}
\ No newline at end of file
diff --git a/src/errors.rs b/src/errors.rs
new file mode 100644
index 0000000..73ecc2d
--- /dev/null
+++ b/src/errors.rs
@@ -0,0 +1,39 @@
+//! Error types for the DNS server.
+//!
+//! This module defines the error types used throughout the DNS server implementation.
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+use thiserror::Error;
+
+/// Represents errors that can occur in the DNS server.
+#[derive(Error, Debug)]
+pub enum DnsError {
+    /// I/O errors from the standard library.
+    #[error("I/O error: {0}")]
+    Io(#[from] std::io::Error),
+    
+    /// Database errors from rusqlite.
+    #[error("Database error: {0}")]
+    Db(#[from] rusqlite::Error),
+    
+    /// Errors related to DNS protocol parsing or formatting.
+    #[error("Invalid DNS packet: {0}")]
+    Protocol(String),
+    
+    /// Configuration errors.
+    #[error("Configuration error: {0}")]
+    Config(String),
+    
+    /// Integer parsing errors.
+    #[error("Parse error: {0}")]
+    Parse(#[from] std::num::ParseIntError),
+    
+    /// Base64 decoding errors.
+    #[error("Base64 error: {0}")]
+    Base64(String),
+    
+    /// Shutdown signal received.
+    #[error("Shutdown signal received")]
+    Shutdown,
+}
\ No newline at end of file
diff --git a/src/handlers.rs b/src/handlers.rs
new file mode 100644
index 0000000..99c5c86
--- /dev/null
+++ b/src/handlers.rs
@@ -0,0 +1,190 @@
+//! Request handlers for the DNS server.
+//!
+//! This module provides functions for handling DNS requests over UDP and TCP.
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+use std::net::SocketAddr;
+use std::sync::Arc;
+use log::{debug, error, info, warn};
+use tokio::{
+    io::AsyncReadExt,
+    net::{TcpListener, TcpStream, UdpSocket},
+    task,
+};
+
+use crate::errors::DnsError;
+use crate::config::ServerConfig;
+use crate::utils::extract_domain;
+use crate::dns::{
+    build_not_implemented_response, build_nxdomain_response, generate_dns_response,
+    send_tcp_response,
+};
+
+/// Run the UDP DNS server.
+///
+/// # Arguments
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` indicating success or failure.
+pub async fn run_udp_server(config: ServerConfig) -> Result<(), DnsError> {
+    let socket = UdpSocket::bind(config.bind_addr).await?;
+    info!("UDP DNS server listening on {}", config.bind_addr);
+    let socket = Arc::new(socket);
+    let mut buf = vec![0u8; config.max_packet_size];
+
+    loop {
+        match socket.recv_from(&mut buf).await {
+            Ok((amt, src)) => {
+                let query = buf[..amt].to_vec();
+                let socket = socket.clone();
+                let config = config.clone();
+                task::spawn(async move {
+                    if let Err(e) = handle_udp_query(query, src, socket, config).await {
+                        warn!("UDP query error: {}", e);
+                    }
+                });
+            }
+            Err(e) => error!("UDP receive error: {}", e),
+        }
+    }
+}
+
+/// Handle a UDP DNS query.
+///
+/// # Arguments
+/// * `query` - The DNS query.
+/// * `src` - The source address of the query.
+/// * `socket` - The UDP socket to send the response on.
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` indicating success or failure.
+pub async fn handle_udp_query(
+    query: Vec<u8>,
+    src: SocketAddr,
+    socket: Arc<UdpSocket>,
+    config: ServerConfig,
+) -> Result<(), DnsError> {
+    if query.len() < 12 {
+        debug!("Received malformed query from {}", src);
+        return Ok(());
+    }
+
+    let opcode = (query[2] & 0x78) >> 3;
+    if opcode != 0 {
+        if let Some(response) = build_not_implemented_response(&query, config.authoritative) {
+            socket.send_to(&response, src).await?;
+        }
+        return Ok(());
+    }
+
+    let domain = match extract_domain(&query) {
+        Some(d) => d,
+        None => {
+            info!("Failed to extract domain from query");
+            return Ok(());
+        }
+    };
+
+    debug!("UDP query for {} from {}", domain, src);
+    info!("Processing query for domain: {}", domain);
+
+    let response = match generate_dns_response(&query, domain.clone(), &config).await {
+        Ok(resp) => resp,
+        Err(_) => {
+            build_nxdomain_response(&query, config.authoritative)
+                .ok_or(DnsError::Protocol("NXDOMAIN".into()))?
+        }
+    };
+
+    socket.send_to(&response, src).await?;
+    Ok(())
+}
+
+/// Run the TCP DNS server.
+///
+/// # Arguments
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` indicating success or failure.
+pub async fn run_tcp_server(config: ServerConfig) -> Result<(), DnsError> {
+    let listener = TcpListener::bind(config.bind_addr).await?;
+    info!("TCP DNS server listening on {}", config.bind_addr);
+
+    loop {
+        match listener.accept().await {
+            Ok((stream, addr)) => {
+                let config = config.clone();
+                task::spawn(async move {
+                    if let Err(e) = handle_tcp_connection(stream, addr, config).await {
+                        warn!("TCP connection error: {}", e);
+                    }
+                });
+            }
+            Err(e) => error!("TCP accept error: {}", e),
+        }
+    }
+}
+
+/// Handle a TCP DNS connection.
+///
+/// # Arguments
+/// * `stream` - The TCP stream.
+/// * `addr` - The client address.
+/// * `config` - The server configuration.
+///
+/// # Returns
+/// A `Result` indicating success or failure.
+pub async fn handle_tcp_connection(
+    mut stream: TcpStream,
+    addr: SocketAddr,
+    config: ServerConfig,
+) -> Result<(), DnsError> {
+    // Read the 2-byte length prefix
+    let mut len_buf = [0u8; 2];
+    stream.read_exact(&mut len_buf).await?;
+    let len = u16::from_be_bytes(len_buf) as usize;
+
+    // Read the DNS query
+    let mut query = vec![0u8; len];
+    stream.read_exact(&mut query).await?;
+
+    if query.len() < 12 {
+        debug!("Received malformed TCP query from {}", addr);
+        return Ok(());
+    }
+
+    let opcode = (query[2] & 0x78) >> 3;
+    if opcode != 0 {
+        if let Some(response) = build_not_implemented_response(&query, config.authoritative) {
+            send_tcp_response(&mut stream, &response).await?;
+        }
+        return Ok(());
+    }
+
+    let domain = match extract_domain(&query) {
+        Some(d) => d,
+        None => {
+            info!("Failed to extract domain from TCP query");
+            return Ok(());
+        }
+    };
+
+    debug!("TCP query for {} from {}", domain, addr);
+    info!("Processing TCP query for domain: {}", domain);
+
+    let response = match generate_dns_response(&query, domain.clone(), &config).await {
+        Ok(resp) => resp,
+        Err(_) => {
+            build_nxdomain_response(&query, config.authoritative)
+                .ok_or(DnsError::Protocol("NXDOMAIN".into()))?
+        }
+    };
+
+    // Send the response (local/cache answer)
+    send_tcp_response(&mut stream, &response).await?;
+    Ok(())
+}
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..4118777
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,23 @@
+//! NX9 DNS Server Library
+//! 
+//! This library provides functionality for a DNS server implementation.
+//! It handles DNS queries over UDP and TCP, supports various record types,
+//! and can forward queries to upstream DNS servers.
+
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+// Define modules
+pub mod errors;
+pub mod config;
+pub mod cache;
+pub mod db;
+pub mod dns;
+pub mod handlers;
+pub mod utils;
+mod error;
+
+// Re-export commonly used items
+pub use errors::DnsError;
+pub use config::ServerConfig;
+pub use cache::DnsCache;
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..98346dc
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,69 @@
+//! NX9 DNS Server
+//!
+//! A DNS server implementation that supports various record types and can forward
+//! queries to upstream DNS servers.
+//!
+//! Author: Sunil Purushottam Thakare
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+use log::info;
+use tokio::{signal, task};
+
+use nx9_dns_server::{
+    cache::{CACHE, CACHE_CLEANUP_INTERVAL},
+    config::ServerConfig,
+    db::init_db,
+    errors::DnsError,
+    handlers::{run_tcp_server, run_udp_server},
+};
+
+#[tokio::main]
+async fn main() -> Result<(), DnsError> {
+    // Initialize the logger
+    env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info"))
+        .format_timestamp_micros()
+        .init();
+
+    // Load configuration from environment variables
+    let config = ServerConfig::from_env()?;
+    
+    // Initialize cache with NS records from config
+    let cache = CACHE.get_or_init(|| nx9_dns_server::cache::DnsCache::new(config.ns_records.clone()));
+
+    // Initialize the database
+    init_db(&config.db_path, &config.default_domain, &config.default_ip)?;
+
+    // Set up cache cleanup task
+    let cache_cleanup = task::spawn({
+        let cache = cache.clone();
+        async move {
+            let mut interval = tokio::time::interval(CACHE_CLEANUP_INTERVAL);
+            loop {
+                interval.tick().await;
+                cache.cleanup();
+            }
+        }
+    });
+
+    // Set up shutdown signal handler
+    let shutdown_signal = async {
+        signal::ctrl_c().await.expect("Failed to listen for shutdown signal");
+        info!("Shutdown signal received");
+    };
+
+    // Start UDP and TCP servers
+    let udp_server = run_udp_server(config.clone());
+    let tcp_server = run_tcp_server(config.clone());
+
+    // Wait for either a shutdown signal or server error
+    tokio::select! {
+        _ = shutdown_signal => {
+            info!("Initiating graceful shutdown...");
+            cache_cleanup.abort();
+            Ok(())
+        },
+        res = udp_server => res,
+        res = tcp_server => res,
+    }
+}
\ No newline at end of file
diff --git a/src/utils.rs b/src/utils.rs
new file mode 100644
index 0000000..8d58a50
--- /dev/null
+++ b/src/utils.rs
@@ -0,0 +1,427 @@
+//! Utility functions for DNS operations.
+//!
+//! This module provides helper functions for parsing and encoding DNS data.
+#![allow(dead_code)]
+#[allow(unused_variables)]
+
+use std::str;
+use chrono::{NaiveDateTime, TimeZone, Utc};
+
+use crate::errors::DnsError;
+
+/// Extract the domain name from a DNS query packet.
+///
+/// # Arguments
+/// * `query` - The DNS query packet.
+///
+/// # Returns
+/// An `Option` containing the domain name if successfully extracted.
+pub fn extract_domain(query: &[u8]) -> Option<String> {
+    if query.len() < 12 {
+        return None; // DNS header is 12 bytes
+    }
+
+    let mut pos = 12; // Start after header
+    let mut domain = String::new();
+
+    // Extract QNAME (domain)
+    loop {
+        if pos >= query.len() {
+            return None;
+        }
+        
+        let len = query[pos] as usize;
+        if len == 0 {
+            break; // End of QNAME
+        }
+        pos += 1;
+
+        if pos + len > query.len() {
+            return None; // Invalid length
+        }
+
+        if !domain.is_empty() {
+            domain.push('.');
+        }
+
+        let label = match str::from_utf8(&query[pos..pos + len]) {
+            Ok(l) => l,
+            Err(_) => return None, // Invalid UTF-8
+        };
+        domain.push_str(label);
+        pos += len;
+    }
+
+    // Skip QTYPE and QCLASS (4 bytes)
+    pos += 4;
+
+    // Verify we have enough data for at least QTYPE/QCLASS
+    if pos > query.len() {
+        return None;
+    }
+
+    Some(domain)
+}
+
+/// Extract the query type from a DNS query packet.
+///
+/// # Arguments
+/// * `query` - The DNS query packet.
+///
+/// # Returns
+/// An `Option` containing the query type as a u16 if successfully extracted.
+pub fn extract_query_type(query: &[u8]) -> Option<u16> {
+    if query.len() < 12 {
+        return None; // DNS header is 12 bytes
+    }
+
+    let mut pos = 12; // Start after header
+
+    // Skip QNAME
+    loop {
+        if pos >= query.len() {
+            return None;
+        }
+
+        let len = query[pos] as usize;
+        if len == 0 {
+            pos += 1;
+            break; // End of QNAME
+        }
+
+        pos += len + 1;
+    }
+
+    // Get QTYPE (2 bytes after QNAME)
+    if pos + 1 < query.len() {
+        Some(((query[pos] as u16) << 8) | query[pos + 1] as u16)
+    } else {
+        None
+    }
+}
+
+/// Encode a domain name in DNS wire format.
+///
+/// # Arguments
+/// * `name` - The domain name to encode.
+///
+/// # Returns
+/// A vector of bytes containing the encoded domain name.
+pub fn encode_dns_name(name: &str) -> Vec<u8> {
+    let mut out = Vec::new();
+    for part in name.trim_end_matches('.').split('.') {
+        if part.len() > 63 {
+            continue; // Skip invalid labels
+        }
+        out.push(part.len() as u8);
+        out.extend_from_slice(part.as_bytes());
+    }
+    out.push(0); // Null terminator
+    out
+}
+
+/// Parse a signature time in YYYYMMDDHHMMSS format to seconds since epoch.
+///
+/// # Arguments
+/// * `s` - The signature time string.
+///
+/// # Returns
+/// A `Result` containing the parsed time as a u32 or an error.
+pub fn parse_sig_time(s: &str) -> Result<u32, DnsError> {
+    let dt = NaiveDateTime::parse_from_str(s, "%Y%m%d%H%M%S")
+        .map_err(|e| DnsError::Config(format!("Invalid sigtime: {e}")))?;
+    Ok(Utc.from_utc_datetime(&dt).timestamp() as u32)
+}
+
+/// Check if a DNS query packet has an OPT record (EDNS).
+///
+/// # Arguments
+/// * `query` - The DNS query packet.
+///
+/// # Returns
+/// A boolean indicating whether the query has an OPT record.
+pub fn has_opt_record(query: &[u8]) -> bool {
+    if query.len() < 12 {
+        return false;
+    }
+
+    // Get ARCOUNT (number of additional records)
+    let arcount = ((query[10] as u16) << 8) | query[11] as u16;
+    if arcount == 0 {
+        return false;
+    }
+
+    // Skip header
+    let mut pos = 12;
+
+    // Skip question section
+    // First skip QNAME
+    loop {
+        if pos >= query.len() {
+            return false;
+        }
+        let len = query[pos] as usize;
+        if len == 0 {
+            pos += 1;
+            break;
+        }
+        pos += len + 1;
+    }
+
+    // Skip QTYPE and QCLASS
+    pos += 4;
+
+    // Skip answer and authority sections
+    let ancount = ((query[6] as u16) << 8) | query[7] as u16;
+    let nscount = ((query[8] as u16) << 8) | query[9] as u16;
+
+    for _ in 0..(ancount + nscount) {
+        // Skip name
+        if pos >= query.len() {
+            return false;
+        }
+
+        // Handle compression pointers
+        if (query[pos] & 0xC0) == 0xC0 {
+            pos += 2; // Skip compression pointer
+        } else {
+            // Skip labels
+            loop {
+                if pos >= query.len() {
+                    return false;
+                }
+                let len = query[pos] as usize;
+                if len == 0 {
+                    pos += 1;
+                    break;
+                }
+                pos += len + 1;
+            }
+        }
+
+        // Skip TYPE, CLASS, TTL, RDLENGTH, RDATA
+        if pos + 10 > query.len() {
+            return false;
+        }
+        let rdlength = ((query[pos + 8] as usize) << 8) | query[pos + 9] as usize;
+        pos += 10 + rdlength;
+    }
+
+    // Check additional records for OPT
+    for _ in 0..arcount {
+        if pos >= query.len() {
+            return false;
+        }
+
+        // OPT record has empty (root) name
+        if query[pos] == 0 {
+            // Check if TYPE is OPT (41)
+            if pos + 2 < query.len() && query[pos + 1] == 0 && query[pos + 2] == 41 {
+                return true;
+            }
+        }
+
+        // Skip this record
+        if pos + 10 >= query.len() { break; }
+        let rdlength = ((query[pos + 8] as usize) << 8) | query[pos + 9] as usize;
+        pos += 10 + rdlength;
+    }
+
+    false // No OPT record found
+}
+
+/// Extract the EDNS payload size from a DNS query packet.
+///
+/// # Arguments
+/// * `query` - The DNS query packet.
+///
+/// # Returns
+/// An `Option` containing the EDNS payload size if found.
+pub fn extract_edns_payload_size(query: &[u8]) -> Option<u16> {
+    if query.len() < 12 {
+        return None;
+    }
+
+    // Get ARCOUNT (number of additional records)
+    let arcount = ((query[10] as u16) << 8) | query[11] as u16;
+    if arcount == 0 {
+        return None;
+    }
+
+    // Skip header
+    let mut pos = 12;
+
+    // Skip question section
+    // First skip QNAME
+    loop {
+        if pos >= query.len() {
+            return None;
+        }
+        let len = query[pos] as usize;
+        if len == 0 {
+            pos += 1;
+            break;
+        }
+        pos += len + 1;
+    }
+
+    // Skip QTYPE and QCLASS
+    pos += 4;
+
+    // Skip answer and authority sections
+    let ancount = ((query[6] as u16) << 8) | query[7] as u16;
+    let nscount = ((query[8] as u16) << 8) | query[9] as u16;
+
+    for _ in 0..(ancount + nscount) {
+        // Skip name
+        if pos >= query.len() {
+            return None;
+        }
+
+        // Handle compression pointers
+        if (query[pos] & 0xC0) == 0xC0 {
+            pos += 2; // Skip compression pointer
+        } else {
+            // Skip labels
+            loop {
+                if pos >= query.len() {
+                    return None;
+                }
+                let len = query[pos] as usize;
+                if len == 0 {
+                    pos += 1;
+                    break;
+                }
+                pos += len + 1;
+            }
+        }
+
+        // Skip TYPE, CLASS, TTL, RDLENGTH, RDATA
+        if pos + 10 > query.len() {
+            return None;
+        }
+        let rdlength = ((query[pos + 8] as usize) << 8) | query[pos + 9] as usize;
+        pos += 10 + rdlength;
+    }
+
+    // Check additional records for OPT
+    for _ in 0..arcount {
+        if pos >= query.len() {
+            return None;
+        }
+
+        // OPT record has empty (root) name
+        if query[pos] == 0 {
+            // Check if TYPE is OPT (41)
+            if pos + 5 < query.len() && query[pos + 1] == 0 && query[pos + 2] == 41 {
+                // Extract UDP payload size (CLASS field in OPT record)
+                return Some(((query[pos + 3] as u16) << 8) | query[pos + 4] as u16);
+            }
+        }
+
+        // Skip this record
+        if pos + 10 >= query.len() { break; }
+        let rdlength = ((query[pos + 8] as usize) << 8) | query[pos + 9] as usize;
+        pos += 10 + rdlength;
+    }
+
+    None // No OPT record found
+}
+
+/// Extract the DO (DNSSEC OK) bit from a DNS query packet.
+///
+/// # Arguments
+/// * `query` - The DNS query packet.
+///
+/// # Returns
+/// A boolean indicating whether the DO bit is set.
+pub fn extract_do_bit(query: &[u8]) -> bool {
+    if query.len() < 12 {
+        return false;
+    }
+
+    // Get ARCOUNT (number of additional records)
+    let arcount = ((query[10] as u16) << 8) | query[11] as u16;
+    if arcount == 0 {
+        return false;
+    }
+
+    // Skip header
+    let mut pos = 12;
+
+    // Skip question section
+    // First skip QNAME
+    loop {
+        if pos >= query.len() {
+            return false;
+        }
+        let len = query[pos] as usize;
+        if len == 0 {
+            pos += 1;
+            break;
+        }
+        pos += len + 1;
+    }
+
+    // Skip QTYPE and QCLASS
+    pos += 4;
+
+    // Skip answer and authority sections
+    let ancount = ((query[6] as u16) << 8) | query[7] as u16;
+    let nscount = ((query[8] as u16) << 8) | query[9] as u16;
+
+    for _ in 0..(ancount + nscount) {
+        // Skip name
+        if pos >= query.len() {
+            return false;
+        }
+
+        // Handle compression pointers
+        if (query[pos] & 0xC0) == 0xC0 {
+            pos += 2; // Skip compression pointer
+        } else {
+            // Skip labels
+            loop {
+                if pos >= query.len() {
+                    return false;
+                }
+                let len = query[pos] as usize;
+                if len == 0 {
+                    pos += 1;
+                    break;
+                }
+                pos += len + 1;
+            }
+        }
+
+        // Skip TYPE, CLASS, TTL, RDLENGTH, RDATA
+        if pos + 10 > query.len() {
+            return false;
+        }
+        let rdlength = ((query[pos + 8] as usize) << 8) | query[pos + 9] as usize;
+        pos += 10 + rdlength;
+    }
+
+    // Check additional records for OPT
+    for _ in 0..arcount {
+        if pos >= query.len() {
+            return false;
+        }
+
+        // OPT record has empty (root) name
+        if query[pos] == 0 {
+            // Check if TYPE is OPT (41)
+            if pos + 7 < query.len() && query[pos + 1] == 0 && query[pos + 2] == 41 {
+                // Check DO bit (bit 15 of TTL field, which is used for flags in OPT)
+                return (query[pos + 6] & 0x80) != 0;
+            }
+        }
+
+        // Skip this record
+        if pos + 10 >= query.len() { break; }
+        let rdlength = ((query[pos + 8] as usize) << 8) | query[pos + 9] as usize;
+        pos += 10 + rdlength;
+    }
+
+    false // No OPT record found or no DO bit set
+}
\ No newline at end of file
diff --git a/start.sh b/start.sh
new file mode 100644
index 0000000..416a672
--- /dev/null
+++ b/start.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+export DNS_BIND=0.0.0.0:53
+export DNS_ENABLE_IPV6=1
+export DNS_MAX_PACKET_SIZE=4096
+export DNS_DB_PATH=/var/nx9-dns-server/dns.db
+export DNS_NS_RECORDS=ns1.yourdomain.tld.,ns2.yourdomain.tld.
+export DNS_AUTHORITATIVE=1
+export DNS_CACHE_TTL=300
+export RUST_LOG=info
+export DNS_DEFAULT_DOMAIN=yourdomain.tld
+export DNS_DEFAULT_IP=<YOUR-PUBLIC-IP4>
+
+exec /var/dns-server/nx9-dns_server