rDNS is a security-focused DNS server. Unlike software intended solely as a recursive resolver, rDNS can operate as a recursive resolver, a forwarding server, an authoritative DNS server, or combine recursive and authoritative duties.
The software uses an asynchronous multi-threaded architecture built on Tokio. Its DNS cache is sharded for concurrent access, while zone information can be held in memory and populated either from conventional zone files or a PostgreSQL backend.
This flexibility makes rDNS potentially useful for installations ranging from self-hosted recursive DNS through to organisations that need authoritative serving and DNS filtering from the same service.
This is free and open source software.
Key Features
- Performs iterative recursive resolution using root hints.
- Can forward requests to configurable upstream DNS resolvers.
- Serves authoritative zones from standard zone files.
- Offers an optional PostgreSQL backend for authoritative DNS data.
- Supports DNS-over-TLS using rustls.
- Performs DNSSEC chain-of-trust validation.
- Provides Response Policy Zone filtering for blocking or redirecting domains.
- Uses a concurrent sharded cache with TTL expiry and negative caching.
- Provides a Unix socket control interface together with the rdns-control command-line utility.
- Exports Prometheus-compatible monitoring metrics.
- Supports privilege dropping and additional platform-specific security mechanisms.
- Can reload PostgreSQL-backed zone information using LISTEN/NOTIFY.
- Supports simultaneous UDP, TCP and encrypted DNS listeners.
Website: github.com/ZerosAndOnesLLC/rDNS
Support:
Developer: ZerosAndOnes LLC
License: MIT License
rDNS is written in Rust. Learn Rust with our recommended free books and free tutorials.
Related Software
| DNS Servers | |
|---|---|
| BIND | Flexible, full-featured DNS system |
| PowerDNS | Authoritative server, the Recursor, and Dnsdist |
| Knot Resolver | Scalable caching resolver with DNSSEC validation and flexible policy |
| Technitium | Self host a DNS server for privacy and security |
| Unbound | Validating, recursive, caching DNS resolver |
| SDNS | Fast recursive DNS resolver with built-in DNSSEC validation |
| Hickory | Rust-based DNS client, server and resolver |
| rDNS | Compact DNS server supporting recursive and authoritative operation |
| MaraDNS | Small DNS server |
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