Antoine Pitrou added the comment:
$ traceroute bugs.python.org
traceroute to bugs.python.org (46.4.197.70), 30 hops max, 60 byte packets
1 93.184.35.125 (93.184.35.125) 0.417 ms 0.594 ms 0.583 ms
2 xe0-0-1-133.edg-sde-3.nerim.net (194.79.129.45) 0.391 ms 0.379 ms 0.533
ms
3 te2-3-136
New submission from Antoine Pitrou:
Lately bugs.python.org has become unreachable if your connection supports IPv6:
$ curl -vI http://bugs.python.org
* About to connect() to bugs.python.org port 80 (#0)
* Trying 2a01:4f8:131:2480::3...
^C
It works fine if you force IPv4 instead:
$ curl -vI
