Re: Outgoing TCP connection problem

From: Stephen Satchell (
Date: Fri Aug 25 2000 - 02:11:27 EST

At 11:53 PM 8/24/00 -0600, you wrote:
> Hello. I have a firewall at home which is used to protect my
> LAN. But I
>have a small problem in that for the past few months (using kernels 2.2.14,
>and a 2.2.17pre with the TCP "hang" fix), outgoing connections to a
>destination port of 80 seem to "hang," and will timeout. Connections to
>other ports seem alright, but most of the traffic is http traffic (I know in
>at lesat one case outgoing IRC seemed to be affected). After 20 or so
>outgoing attempts are tried after the hang is discovered, connections start
>working again. Existing connections continue unaffected.
> I use a large-ish ipchains ruleset, and have port fowarding
> turned on to
>allow compatbility with some net games I use. It's been getting worse
>(occuring more often) as my ipchains ruleset has grown. Any help is
For what it's worth, I have exactly the same thing happen with 2.2.5: an
attempt to make any connection to a specific location from any machine on
my intranet fails for about two minutes, and netstat shows no
problems. After two minutes, everything is fine. During that two-minute
period, almost every other request goes through without
problems. (Sometimes I'll have two or even three locations that are hosed,
but they appear to be hosed independently because the first to freeze is
the first to thaw, and so forth.)

The really bad news is that it's an intermittent problem, with absolutely
NO predictability, and by the time I can bring enough tools to bear on the
problem, it's "cured." It happens when the clients in use are Linux,
Windows, or Macintosh. It can happen in any hour of the day.

The good news is that it happens so seldom that I haven't found it
necessary to worry about spending a lot of time on it. It happens once
every three-four days.

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