From: Sebastian Benoit <benoit-lists@fb12.de>
To: "David S. Miller" <davem@redhat.com>
Cc: kuznet@ms2.inr.ac.ru, dada1@cosmosbay.com, cgf@redhat.com,
andersg@0x63.nu, lkernel2003@tuxers.net,
linux-kernel@vger.kernel.org, tobi@tobi.nu
Subject: Re: [TEST FIX] Re: SSH Hangs in 2.5.59 and 2.5.55 but not 2.4.x, through Cisco PIX
Date: Tue, 28 Jan 2003 20:16:45 +0100 [thread overview]
Message-ID: <20030128201645.A29746@turing.fb12.de> (raw)
In-Reply-To: <20030128.103534.115458142.davem@redhat.com>; from davem@redhat.com on Tue, Jan 28, 2003 at 10:35:34AM -0800
[-- Attachment #1: Type: text/plain, Size: 3935 bytes --]
David S. Miller(davem@redhat.com)@2003.01.28 10:35:34 +0000:
> From: kuznet@ms2.inr.ac.ru
> Date: Tue, 28 Jan 2003 17:09:09 +0300 (MSK)
>
> We apparently have segment of zero length in queue. :-)
>
> Well, that chunk cannot be responsible for this directly, I am afraid
> we somewhat arrived to attempt to retransmit already acked segment.
>
> Hmmm, it is one of few places where sequence numbers of already
> sent packet are mangled. :-)
>
> Good set of debug checks would be the following:
no output, i did 4 tests, everytime i was able to lock the ssh-connection
within a few seconds. kernel 2.5.59 + your debug-patch.
tcpdump of one:
20:07:30.788431 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: . ack 4359 win 13888 <nop,nop,timestamp 591456 50952833> (DF) [tos 0x10]
20:07:31.054101 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: P 2927:2975(48) ack 4359 win 13888 <nop,nop,timestamp 591722 50952833> (DF) [tos 0x10]
20:07:31.119062 turing.fb12.de.ssh > ronja.fluchtwagenfahrer.de.32774: P 4359:4407(48) ack 2975 win 10944 <nop,nop,timestamp 50952865 591722> (DF) [tos 0x10]
20:07:31.119102 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: . ack 4407 win 13888 <nop,nop,timestamp 591787 50952865> (DF) [tos 0x10]
20:07:31.132819 turing.fb12.de.ssh > ronja.fluchtwagenfahrer.de.32774: P 4407:4487(80) ack 2975 win 10944 <nop,nop,timestamp 50952865 591722> (DF) [tos 0x10]
20:07:31.132842 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: . ack 4487 win 13888 <nop,nop,timestamp 591801 50952865> (DF) [tos 0x10]
20:07:31.132930 turing.fb12.de.ssh > ronja.fluchtwagenfahrer.de.32774: P 4487:4551(64) ack 2975 win 10944 <nop,nop,timestamp 50952866 591722> (DF) [tos 0x10]
20:07:31.132951 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: . ack 4551 win 13888 <nop,nop,timestamp 591801 50952866> (DF) [tos 0x10]
20:07:31.602060 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: P 2975:3023(48) ack 4551 win 13888 <nop,nop,timestamp 592270 50952866> (DF) [tos 0x10]
20:07:31.687764 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: P 3023:3071(48) ack 4551 win 13888 <nop,nop,timestamp 592356 50952866> (DF) [tos 0x10]
20:07:31.834730 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: P 2975:3023(48) ack 4551 win 13888 <nop,nop,timestamp 592503 50952866> (DF) [tos 0x10]
20:07:31.888875 turing.fb12.de.ssh > ronja.fluchtwagenfahrer.de.32774: P 4551:4599(48) ack 3023 win 10944 <nop,nop,timestamp 50952942 592503> (DF) [tos 0x10]
---- here it hangs ---
20:07:31.888910 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: . ack 4599 win 13888 <nop,nop,timestamp 592557 50952942> (DF) [tos 0x10]
20:07:32.300653 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: P ack 4599 win 13888 <nop,nop,timestamp 592969 50952942> (DF) [tos 0x10]
20:07:33.232614 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: P ack 4599 win 13888 <nop,nop,timestamp 593901 50952942> (DF) [tos 0x10]
20:07:35.096334 ronja.fluchtwagenfahrer.de.32774 > turing.fb12.de.ssh: P ack 4599 win 13888 <nop,nop,timestamp 595765 50952942> (DF) [tos 0x10]
20:07:37.269116 ronja.fluchtwagenfahrer.de.32773 > turing.fb12.de.ssh: P ack 1 win 34800 <nop,nop,timestamp 597938 50948566> (DF) [tos 0x10]
/B.
--
Sebastian Benoit <benoit-lists@fb12.de>
My mail is GnuPG signed -- Unsigned ones are bogus -- http://www.gnupg.org/
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causes insanity. Repetition causes insanity. Repetition causes insanity.
Repetition causes insanity. Repetition causes insanity. Repetition causes
insanity. Repetition causes insanity. Repetition causes insanity. Repetition
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next prev parent reply other threads:[~2003-01-28 19:07 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-24 18:43 SSH Hangs in 2.5.59 and 2.5.55 but not 2.4.x, through Cisco PIX David C Niemi
2003-01-24 20:29 ` David S. Miller
2003-01-24 20:46 ` lost
2003-01-24 21:15 ` Christopher Faylor
2003-01-25 2:00 ` SSH Hangs in 2.5.59 and 2.5.55 (TCP_NODELAY?) Christopher Faylor
2003-01-27 14:27 ` SSH Hangs in 2.5.59 and 2.5.55 but not 2.4.x, through Cisco PIX David C Niemi
2003-01-27 18:06 ` David S. Miller
2003-01-27 18:11 ` David S. Miller
2003-01-27 18:28 ` Anders Gustafsson
2003-01-27 22:36 ` [TEST FIX] " David S. Miller
2003-01-28 2:25 ` lost
2003-01-28 2:57 ` [TEST FIX] Re: SSH Hangs in 2.5.59 and 2.5.55 but not 2.4.x, kuznet
2003-01-28 3:22 ` Christopher Faylor
2003-01-28 3:39 ` [TEST FIX] Re: SSH Hangs in 2.5.59 and 2.5.55 but not 2.4.x, through Cisco PIX Christopher Faylor
2003-01-28 3:55 ` kuznet
2003-01-28 7:08 ` dada1
2003-01-28 12:36 ` Sebastian Benoit
2003-01-28 14:09 ` kuznet
2003-01-28 18:35 ` David S. Miller
2003-01-28 19:16 ` Sebastian Benoit [this message]
2003-01-28 20:34 ` David S. Miller
2003-01-28 21:59 ` Christopher Faylor
2003-01-28 22:12 ` Sebastian Benoit
2003-01-28 23:21 ` David S. Miller
2003-01-29 0:02 ` [TEST FIX] Re: SSH Hangs in 2.5.59 and 2.5.55 but not 2.4.x, kuznet
2003-01-29 0:09 ` kuznet
2003-01-29 0:46 ` Sebastian Benoit
2003-01-29 4:12 ` Christopher Faylor
2003-01-29 6:52 ` David S. Miller
2003-01-28 23:56 ` kuznet
2003-01-29 0:08 ` David S. Miller
2003-01-29 3:14 ` kuznet
2003-01-29 7:32 ` David S. Miller
2003-01-29 14:12 ` David C Niemi
2003-01-29 14:24 ` kuznet
2003-01-29 15:11 ` dada1
2003-02-02 15:40 ` Bill Davidsen
2003-01-27 21:27 ` SSH Hangs in 2.5.59 and 2.5.55 but not 2.4.x, through Cisco PIX Bill Davidsen
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