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DNSmasq hosts.d to BIND9 Zone Generator

A simple web-based tool to convert dnsmasq-style host records from hosts.d files into BIND9 forward and reverse zone files. Perfect for migrating DNS configurations from dnsmasq to BIND9 or generating zone files for internal networks.

✨ Features

  • Input Parsing: Paste dnsmasq-style host records (format: IP primary-host alias1 alias2)
  • Network Filtering: Only process records matching a specified network prefix
  • Forward Zone Generation:
    • Option for full zone file (with SOA/NS records) or include file (records only)
    • Primary hostname becomes A record
    • Additional hostnames become CNAME records
  • Reverse Zone Generation: Automatic PTR records for reverse DNS
  • Validation & Warnings: Detects potential issues like duplicate hostnames, invalid IPs, etc.
  • Copy & Download: Easy export of generated zone files
  • Customizable: Configure domain, TTL, DNS host, admin name, and more

📖 Usage

  1. Configure Settings:

    • Forward zone domain: Your domain (e.g., example.com)
    • Network prefix filter: IP prefix to match (e.g., 192.168.1.)
    • Authoritative DNS host: Name for SOA/NS records
    • SOA admin name: Admin contact for SOA
    • TTL: Time-to-live for records
    • Output mode: Choose between full zone file or include file

  2. Paste Host Records:

    • Enter dnsmasq-style entries, one per line
    • Format: IP primary-hostname alias1 alias2
    • Example: 
      192.168.1.10 server1 srv1
192.168.1.20 webserver www

  3. Generate Zones:

    • Click "Generate BIND9" to create forward and reverse zone files
    • Review validation warnings if any
    • Copy or download the output

  4. Output:

    • Forward Zone: A records for primary hosts, CNAMEs for aliases
    • Reverse Zone: PTR records for reverse DNS lookup

🤝 Contributing

Contributions welcome! This is a simple static site, so:

  1. Fork the repository
  2. Make your changes to index.html
  3. Test locally
  4. Submit a pull request

📄 License

MIT License - feel free to use and modify as needed.

🙏 Acknowledgments

Built with vanilla HTML, CSS, and JavaScript. Inspired by the need to migrate DNS configurations from dnsmasq to BIND9 in enterprise environments.