Closed erikmd closed 3 years ago
@erikmd Thanks for reporting! The DNS resolution seems ok, the web server too (no IPv4-specific config), but there seems to be something wrong on the network routes set up by the VPS. I'll try to fix that first.
@erikmd do you mind testing again?
Hi @maximedenes, yes, that seems very OK now:
$ timeout -s SIGINT 10s ping coq.inria.fr
PING coq.inria.fr(2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43)) 56 data bytes
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=1 ttl=47 time=28.2 ms
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=2 ttl=47 time=28.6 ms
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=3 ttl=47 time=35.5 ms
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=4 ttl=47 time=46.1 ms
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=5 ttl=47 time=27.3 ms
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=6 ttl=47 time=53.4 ms
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=7 ttl=47 time=29.1 ms
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=8 ttl=47 time=29.0 ms
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=9 ttl=47 time=28.9 ms
64 bytes from 2001:41d0:305:2100::8b43 (2001:41d0:305:2100::8b43): icmp_seq=10 ttl=47 time=28.5 ms
--- coq.inria.fr ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9012ms
rtt min/avg/max/mdev = 27.330/33.500/53.499/8.593 ms
and opam update
was successful on this machine.
Thanks for the fix!
Description of the problem
This is a follow-up of the issue raised on Zulip, which is still reproducible:
it seems the
coq.inria.fr
server has some configuration issue w.r.t. IPv6, which can also impactopam update
:To be more precise, here is an example session on a Linux environment where DNS addresses appear to resolve to IPv6 first:
while it is OK with IPv4:
ideas on how this could be fixed or workarounded? (especially for the
opam update
use case)