Heavy Networking 638: Don’t Block DNS Over TCP

DNS is our subject on today’s Heavy Networking. More specifically, DNS transport over TCP. We talk with John Kristoff, one of the forces behind RFC9210, which covers the operational requirements for DNS transport over TCP. This RFC is designated as Best Current Practice. In other words, this is not some esoteric document covering some tiny, nuanced DNS use case. Instead this doc will likely affect most of you listening, whether you’re a network operator or a name server operator. We talk with John about the implications of this RFC. Sponsor: Juniper Apstra Apstra’s intent-based multi-vendor networking solution helps you build your data center network to a specific design, and then make sure it stays within that spec. Apstra enables deployment automation and continuous validation. Find out more at juniper.net/packetpushers/apstra. Show Links: DataPlane.org RFC9210/BCP235 The Making of BCP 235 – From John’s blog @jtkristoff – John Kristoff on Twitter DNS OARC mailing lists DNS over TCP: A Rudimentary Textual Analysis – PDF from NANOG 63