v6 DNSSEC fail, was Buying IPv4 blocks

Mark Tinka mark.tinka at seacom.mu
Fri Oct 5 05:12:26 UTC 2018


On 5/Oct/18 03:07, John Levine wrote:

> Yeah, V6 UDP fragmentation and anycast are bad news.  You can sort of
> fix it by doing all your v6 DNSSEC DNS queries over TCP but it's a lot
> easier to stick to v4.
>
> Geoff Huston has written about this a lot and it's a well known problem
> in the DNS community.  I'm surprised if it's news to anyone here.
>
> https://blog.apnic.net/2017/08/22/dealing-ipv6-fragmentation-dns/

In BIND, I think this can be solved by using the "minimal-responses" knob.

Mark.
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