Bug 742326

Summary:	gannet.gentoo.org is not available over ipv6 (at least from HE.net)
Product:	Gentoo Infrastructure	Reporter:	Sergei Trofimovich (RETIRED) <slyfox>
Component:	Other web server issues	Assignee:	Gentoo Infrastructure <infra-bugs>
Status:	CONFIRMED ---
Severity:	normal
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Sergei Trofimovich (RETIRED) gentoo-dev

2020-09-13 10:29:22 UTC

IPv6 traffic is blackholed somewhere. IPv4 works. I think it happens for a few days.

Tested from my home box, from woodpecker and from guppy dev box. Same blackholing result.

$ LANG=C wget https://gannet.gentoo.org
--2020-09-13 10:23:59--  https://gannet.gentoo.org/
Resolving gannet.gentoo.org... 2607:fcc0:4:ffff::4, 204.187.15.4
Connecting to gannet.gentoo.org|2607:fcc0:4:ffff::4|:443...<hangs>

 $ traceroute6 gannet.gentoo.org
traceroute to gannet.gentoo.org (2607:fcc0:4:ffff::4), 30 hops max, 80 byte packets
 1  <HE.net hop 1>
 2  <HE.net hop 2>
 3  <HE.net hop 3>
 4  v6-rc1wt-ge4-1.wa.shawcable.net (2001:504:16::18b7)  13.914 ms  13.889 ms *
 5  2001:4e8:0:80ce::1 (2001:4e8:0:80ce::1)  16.958 ms  16.939 ms  16.907 ms
 6  2001:4e8:0:80b8::b (2001:4e8:0:80b8::b)  16.816 ms  12.694 ms  12.662 ms
 7  * * *
...
30  * * *

Don't know if it's a DNS misconfiguration or bad routing. Assuming first.

Comment 1 Sergei Trofimovich (RETIRED) gentoo-dev

2020-09-20 07:16:48 UTC

I poked a bit from various HE senders and other IPv6 sources. It looks like IPv6 packets get routed successfully to 2607:fcc0:4:ffff::4 from both HE and non-HE ISPs.

Can you run 'traceroute 2001:470:ea4a:1:5054:ff:fec7:86e4' and 'ping 2001:470:ea4a:1:5054:ff:fec7:86e4' on gannet.gentoo.org so it would be obvious whether packets get to HE at all?