TLDR Tech / InfoSec
PolarDNS
PolarDNS is a Python-based authoritative DNS server built for security testing of DNS resolvers, clients, libraries, and parsers over both UDP and TCP. It exposes over 70 features and 19 response modifiers to generate malformed, RFC-violating, and otherwise pathological DNS responses, enabling research into cache poisoning, resource exhaustion, sloth domain attacks, and resolver crashes. GitHub Actions workflow templates for BIND9, CoreDNS, Dnsmasq, Knot, PowerDNS, and Unbound are included for automated E2E test suite integration.
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