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Hello BIND community,</div>
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I'd like to announce the release of a new open-source DLZ driver for BIND 9.18+ that provides dynamic DNS resolution for Netbird VPN peers.</div>
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<b>## Overview</b></div>
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Netbird (https://netbird.io) is an open-source WireGuard-based mesh VPN. This DLZ plugin fetches peer information from the Netbird API and serves A records for peer hostnames, allowing DNS queries like:</div>
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nas.vpn.example.com -> 100.64.0.5</div>
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<b>## Technical Details</b></div>
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- Written in C using the BIND 9.18+ DLZ dlopen interface</div>
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- Uses official BIND headers (dns/dlz_dlopen.h, dns/sdlz.h)</div>
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- Background pthread fetches from Netbird API every 5 minutes</div>
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- Thread-safe lookups using pthread_rwlock</div>
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- Atomic cache updates (pointer swap pattern)</div>
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- Links against libcurl, jansson (JSON), and BIND's libdns/libisc</div>
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<b>## Configuration Example</b></div>
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dlz "netbird" {</div>
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database "dlopen /usr/lib/bind/netbird_dlz.so</div>
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bird.example.com</div>
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YOUR_NETBIRD_API_KEY</div>
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https://your-netbird-instance/api/peers";</div>
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};</div>
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<b>## Repository</b></div>
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https://github.com/XNet-NGO/bind-dlz-netbird</div>
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The README includes:</div>
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- Build instructions for BIND 9.18+</div>
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- Docker deployment example</div>
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- Troubleshooting guide</div>
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<b>## Compatibility</b></div>
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Tested with BIND 9.18.39 on Ubuntu 22.04 (ARM64). Should work with any BIND 9.18+ release using the modern DLZ API with dns_sdlzlookup_t.</div>
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Feedback and contributions are welcome.</div>
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XNet Inc.</div>
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https://xnet.ngo</div>
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XNet is a nonprofit corporation building network infrastructure for underserved communities.</div>
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