9 Nov
2023
9 Nov
'23
2:41 a.m.
The other thing it could be is broken PMTUD / failure fragment at network MTU. We defined socket options to do this 2 decades ago. -- Mark Andrews
On 9 Nov 2023, at 06:00, Matthew Pounsett <matt@conundrum.com> wrote:
On Wed, Nov 8, 2023 at 2:12 AM Bryan Fields <Bryan@bryanfields.net> wrote:
Could these be related to the fact that dnsvis.net is trying to reach these servers via IPv6 and I think they use Hurricane for transit. Since HE and Cogent is a major gap, this causes them to time out trying to reach the C root server over IPv6.
We have a tunnel set up to allow DNSViz to reach C-root, however anything else single-homed on Cogent is unreachable to DNSViz via IPv6.