The Everything Feed - All Packet Pushers Pods IPB179: IPv6 DNS Gotchas
Jul 17, 2025
Discover the common misconceptions surrounding DNS and its interplay with IPv6. Learn about the Happy Eyeballs mechanism that enhances user connectivity experiences. Delve into the complexities of DNS record types and their implications for DNSSEC. Explore how client devices resolve DNS queries and the evolving challenges of securing DNS with methods like DoT and DoH. The discussion encourages community engagement, inviting IT professionals to share their experiences with IPv6 DNS challenges.
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DNS Protocol vs Record Type Confusion
- DNS resolvers can return records for protocols they don't use themselves.
- IPv4-only resolvers can return IPv6 records like AAAA without issues.
DNS Records Independent of Transport Protocol
- DNS record types don't depend on connection protocol between client and resolver.
- Passing AAAA records over IPv4 or A records over IPv6 is fully possible and often done.
Happy Eyeballs Enhances IPv6 Usability
- Happy Eyeballs allows simultaneous IPv4 and IPv6 connections to improve user experience.
- It solves prior IPv6 connection failures by trying both and picking the fastest working one.