[Bug 702304] New: www/en.opensuse.org hard to reach over IPv6
time wget -O- en.opensuse.org asking libproxy about url 'http://en.opensuse.org/'
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c0 Summary: www/en.opensuse.org hard to reach over IPv6 Classification: openSUSE Product: openSUSE.org Version: unspecified Platform: All OS/Version: openSUSE 11.4 Status: NEW Severity: Major Priority: P5 - None Component: Infrastructure AssignedTo: lrupp@novell.com ReportedBy: bwiedemann@novell.com QAContact: lrupp@novell.com CC: deckel@novell.com Found By: --- Blocker: --- www/en.opensuse.org pages are hard to reach over IPv6 This only appears to happen with some types of IPv6 network connections (e.g. sixxs.net tunnel for me - has this been seen with any others? otherwise it could be a problem with sixxs.net) and only with a subset of addresses. Steps To Reproduce: libproxy suggest to use 'direct://' --2011-06-27 11:23:03-- http://en.opensuse.org/ Resolving en.opensuse.org... 2600:806:310::100, 130.57.4.24 Connecting to en.opensuse.org|2600:806:310::100|:80... failed: Connection timed out. Connecting to en.opensuse.org|130.57.4.24|:80... connected. HTTP request sent, awaiting response... 301 Moved Permanently Location: http://en.opensuse.org/Main_Page [following] asking libproxy about url 'http://en.opensuse.org/Main_Page' libproxy suggest to use 'direct://' --2011-06-27 11:26:12-- http://en.opensuse.org/Main_Page Connecting to en.opensuse.org|130.57.4.24|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 24446 (24K) [text/html] Saving to: “STDOUT” [...] </html> 100%[======================================>] 24,446 72.9K/s in 0.3s 2011-06-27 11:26:13 (72.9 KB/s) - written to stdout [24446/24446] real 3m10.513s user 0m0.003s sys 0m0.005s btw: same applies to www.suse.com / www.novell.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c1 Lars Vogdt <lrupp@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO CC| |lrupp@suse.com InfoProvider| |bwiedemann@novell.com --- Comment #1 from Lars Vogdt <lrupp@suse.com> 2011-06-28 23:03:04 UTC --- Can you try to reduce the MTU of your connection manually? Sounds to me like one of the problems listed here: http://news.opensuse.org/2011/06/09/world-ipv6-day-results/ -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c3 Bernhard Wiedemann <bwiedemann@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |NEW InfoProvider|bwiedemann@novell.com | --- Comment #3 from Bernhard Wiedemann <bwiedemann@novell.com> 2011-06-30 15:34:28 CEST --- setting MTU 1280 did not help. packets up to a certain size work, so I did send one byte too many with this: ping6 -s 1233 www.novell.com on my sixxs gateway I see in tcpdump: 15:25:18.539503 IP6 2001:6f8:11fc:f::1 > 2600:806:310::102: frag (0|1232) ICMP6, echo request, seq 175, length 1232 15:25:18.539535 IP6 2001:6f8:11fc:f::1 > 2600:806:310::102: frag (1232|10) 15:25:19.261261 IP6 2600:806:310::102 > 2001:6f8:11fc:f::1: ICMP6, time exceeded in-transit (reassembly), length 1240 15:25:19.550786 IP6 2001:6f8:11fc:f::1 > 2600:806:310::102: frag (0|1232) ICMP6, echo request, seq 176, length 1232 15:25:19.550808 IP6 2001:6f8:11fc:f::1 > 2600:806:310::102: frag (1232|10) 15:25:20.261328 IP6 2600:806:310::102 > 2001:6f8:11fc:f::1: ICMP6, time exceeded in-transit (reassembly), length 1240 15:25:20.566266 IP6 2001:6f8:11fc:f::1 > 2600:806:310::102: frag (0|1232) ICMP6, echo request, seq 177, length 1232 15:25:20.566321 IP6 2001:6f8:11fc:f::1 > 2600:806:310::102: frag (1232|10) so it would be a problem with fragmentation - possibly from ICMP6 packets being dropped by some stupid firewall (as already happened with IPv4) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c4 --- Comment #4 from Christian Deckelmann <deckel@novell.com> 2011-06-30 14:04:36 UTC --- Interesting. When I run the same ping6 on my sixxs gateway I get an echo reply: 15:56:09.733062 IP6 2001:a60:f000:a1::2 > 2600:806:310::102: frag (0|1232) ICMP6, echo request, seq 1, length 1232 15:56:09.733087 IP6 2001:a60:f000:a1::2 > 2600:806:310::102: frag (1232|9) 15:56:09.940618 IP6 2600:806:310::102 > 2001:a60:f000:a1::2: frag (1232|9) 15:56:09.940738 IP6 2600:806:310::102 > 2001:a60:f000:a1::2: frag (0|1232) ICMP6, echo reply, seq 1, length 1232 15:56:10.734769 IP6 2001:a60:f000:a1::2 > 2600:806:310::102: frag (0|1232) ICMP6, echo request, seq 2, length 1232 15:56:10.734789 IP6 2001:a60:f000:a1::2 > 2600:806:310::102: frag (1232|9) 15:56:10.942318 IP6 2600:806:310::102 > 2001:a60:f000:a1::2: frag (1232|9) 15:56:10.942680 IP6 2600:806:310::102 > 2001:a60:f000:a1::2: frag (0|1232) ICMP6, echo reply, seq 2, length 1232 Why is the fragmented packet different in size? ANd why do I get an echo reply and you get a time exceeded in-transit? Provided the time exceeded in-transit is related to your ping. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c5 --- Comment #5 from Bernhard Wiedemann <bwiedemann@novell.com> 2011-06-30 17:42:22 CEST --- apart from the MTU=1280 which seems to be identical, we do use different POPs of sixxs.net. I use Easynet Group plc and you M-net Telekommunikations GmbH The time exceeded messages only started after some seconds (probably after a timeout on the destination). -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c Christian Deckelmann <deckel@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|deckel@novell.com |lrupp@suse.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c8 --- Comment #8 from Christian Deckelmann <deckel@novell.com> 2011-07-05 15:23:57 UTC --- I just tried to reproduce the problem but failed. Bernhard, can you please try again. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c Lars Vogdt <lrupp@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO InfoProvider| |bwiedemann@novell.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c9 Bernhard Wiedemann <bwiedemann@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |NEW InfoProvider|bwiedemann@novell.com | --- Comment #9 from Bernhard Wiedemann <bwiedemann@novell.com> 2011-07-11 21:21:30 CEST --- just retried. looks better right now:
ping6 -s 1233 www.opensuse.org PING www.opensuse.org(2600:806:310::100) 1233 data bytes From 2001:6f8:11fc:9000::1 icmp_seq=1 Packet too big: mtu=1280 1241 bytes from 2600:806:310::100: icmp_seq=2 ttl=45 time=295 ms 1241 bytes from 2600:806:310::100: icmp_seq=3 ttl=45 time=297 ms 1241 bytes from 2600:806:310::100: icmp_seq=4 ttl=45 time=294 ms 1241 bytes from 2600:806:310::100: icmp_seq=5 ttl=45 time=295 ms
2001:6f8:11fc:9000::1 is my gateway to sixxs. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
https://bugzilla.novell.com/show_bug.cgi?id=702304 https://bugzilla.novell.com/show_bug.cgi?id=702304#c10 Lars Vogdt <lrupp@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |CLOSED Resolution| |FIXED --- Comment #10 from Lars Vogdt <lrupp@suse.com> 2011-07-19 21:49:26 CEST --- (In reply to comment #9)
just retried. looks better right now:
ok, in this case I like to close this now. Thanks, Bernhard, for testing - and thanks, Christian, for fixing! -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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