[pydotorg-www] Fwd: Re: Connection problems with IPv6 - persistent for more than a month now
webmaster at python.org
webmaster at python.org
Sun Feb 13 15:03:22 CET 2011
A user having trouble with python.org over ipv6. He assures us he *can*
connect to other sites with ipv6 and has provided some diagnostic
information.
Michael
-------- Original Message --------
Subject: Re: Connection problems with IPv6 - persistent for more than a
month now
Date: Sun, 13 Feb 2011 08:49:32 -0500
From: Matthew Roy <matthew at royhousehold.net>
To: webmaster at python.org
I'm pretty sure that this is not a local problem for two reasons. First,
your site _is_ reachable - it just isn't responding to HTTP requests
sent over IPv6. Second, as you said, I can reach other IPv6 sites just
fine:
matthew at smilebox:~$ wget -6 www.google.com <http://www.google.com>
--2011-02-13 08:37:53-- http://www.google.com/
Resolving www.google.com... 2001:4860:8009::69
Connecting to www.google.com
<http://www.google.com>|2001:4860:8009::69|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: `index.html.2'
[ <=>
] 8,844 39.8K/s in 0.2s
2011-02-13 08:37:53 (39.8 KB/s) - `index.html.2' saved [8844]
matthew at smilebox:~$ wget www.kame.net <http://www.kame.net>
--2011-02-13 08:48:29-- http://www.kame.net/
Resolving www.kame.net... 2001:200:dff:fff1:216:3eff:feb1:44d7,
203.178.141.194
Connecting to www.kame.net
<http://www.kame.net>|2001:200:dff:fff1:216:3eff:feb1:44d7|:80...
connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: `index.html.3'
[ <=>
] 3,181 7.94K/s in 0.4s
2011-02-13 08:48:41 (7.94 KB/s) - `index.html.3' saved [3181]
I'm 98% sure this problem is on your end - if I had to hazard a guess
I'd say your webserver(s) or firewall are silently dropping IPv6
connections to port 80. Could it still be a weird browser or stack issue
- sure, they're complicated software and could be mis-configured or have
bugs, but can *you* reach the site over IPv6?
Matthew
On Sun, Feb 13, 2011 at 07:56, <webmaster at python.org
<mailto:webmaster at python.org>> wrote:
Hello Matthew,
We've had several reports of IPv6 connection problems in the past.
They have *all* turned out to be client difficulties and not
problems with python.org <http://python.org>.
Can you please check connecting to other websites using IPv6. If
they work but python.org <http://python.org> still fails come back
to us.
Many thanks,
Michael Foord
On 12/02/2011 21:46, Matthew Roy wrote:
> When connecting over IPv6 all of the python.org
> <http://python.org> websites timeout - even though name resolution
> and connectivity are working:
>
> matthew at smilebox:~$ wget -4 www.python.org <http://www.python.org>
> --2011-02-12 16:39:28-- http://www.python.org/
> Resolving www.python.org <http://www.python.org>... 82.94.164.162
> Connecting to www.python.org
> <http://www.python.org>|82.94.164.162|:80... connected.
> HTTP request sent, awaiting response... 200 OK
> Length: 18848 (18K) [text/html]
> Saving to: `index.html.1'
>
> 100%[======================================>] 18,848
> 95.8K/s in 0.2s
>
> 2011-02-12 16:39:28 (95.8 KB/s) - `index.html.1' saved
> [18848/18848]
>
> matthew at smilebox:~$ wget -6 www.python.org <http://www.python.org>
> --2011-02-12 16:39:40-- http://www.python.org/
> Resolving www.python.org <http://www.python.org>...
> 2001:888:2000:d::a2
> Connecting to www.python.org
> <http://www.python.org>|2001:888:2000:d::a2|:80... connected.
> HTTP request sent, awaiting response...
>
>
> Yet we have good DNS entries:
>
> matthew at smilebox:~$ dig www.python.org <http://www.python.org> ANY
>
> ; <<>> DiG 9.7.1-P2 <<>> www.python.org
> <http://www.python.org> ANY
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11917
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 6,
> ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.python.org <http://www.python.org>.INANY
>
> ;; ANSWER SECTION:
> www.python.org <http://www.python.org>.82745INA82.94.164.162
> www.python.org
> <http://www.python.org>.82744INAAAA2001:888:2000:d::a2
>
> ;; AUTHORITY SECTION:
> org.106654INNSc0.org.afilias-nst.info
> <http://c0.org.afilias-nst.info>.
> org.106654INNSa2.org.afilias-nst.info
> <http://a2.org.afilias-nst.info>.
> org.106654INNSb0.org.afilias-nst.org
> <http://b0.org.afilias-nst.org>.
> org.106654INNSb2.org.afilias-nst.org
> <http://b2.org.afilias-nst.org>.
> org.106654INNSd0.org.afilias-nst.org
> <http://d0.org.afilias-nst.org>.
> org.106654INNSa0.org.afilias-nst.info
> <http://a0.org.afilias-nst.info>.
>
> ;; Query time: 0 msec
> ;; SERVER: 192.168.2.5#53(192.168.2.5)
> ;; WHEN: Sat Feb 12 16:42:20 2011
> ;; MSG SIZE rcvd: 214
>
>
>
> And good connectivity:
>
> matthew at smilebox:~$ ping6 www.python.org
> <http://www.python.org> -c 10
> PING www.python.org
> <http://www.python.org>(dinsdale.python.org
> <http://dinsdale.python.org>) 56 data bytes
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=1 ttl=50 time=126 ms
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=2 ttl=50 time=118 ms
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=3 ttl=50 time=122 ms
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=4 ttl=50 time=135 ms
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=5 ttl=50 time=108 ms
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=6 ttl=50 time=101 ms
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=7 ttl=50 time=104 ms
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=8 ttl=50 time=106 ms
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=9 ttl=50 time=101 ms
> 64 bytes from dinsdale.python.org
> <http://dinsdale.python.org>: icmp_seq=10 ttl=50 time=102 ms
>
> --- www.python.org <http://www.python.org> ping statistics ---
> 10 packets transmitted, 10 received, 0% packet loss, time 9013ms
> rtt min/avg/max/mdev = 101.504/112.742/135.351/11.542 ms
>
>
> If you need any additional information to help resolve these
> issues please let me know.
>
> Mathew
>
--
http://www.voidspace.org.uk/
May you do good and not evil
May you find forgiveness for yourself and forgive others
May you share freely, never taking more than you give.
-- the sqlite blessinghttp://www.sqlite.org/different.html
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