sdns

SDNS is a high-performance, recursive DNS resolver server with DNSSEC support,
focused on preserving privacy. It supports DNS-over-TLS, DNS-over-HTTPS,
DNS-over-QUIC, and includes features like caching, rate limiting, and blocklists.

Features:
- DNSSEC validation
- DNS-over-HTTPS (DoH)
- DNS-over-TLS (DoT)
- DNS-over-QUIC (DoQ)
- Built-in cache with prefetching
- Blocklist support with auto-updates
- Rate limiting
- Access control lists
- Prometheus metrics
- Extended DNS Errors (EDE) support