RE: [cobalt-users] Strange HTTP Problem

["E.B. Dreger" <eddy+public+spam@xxxxxxxxxxxxxxxxx>]

SP> Date: Tue, 28 May 2002 16:20:07 +0100
SP> From: Simon Pierce


SP> So can this effect you only if you're using one particular
SP> ISP, but not effect you if you're using any other?

If the ISP is doing something funky with MTU or fragmentation,
yes.

My guess is it has something to do with their terminal server.
The fact that they can email you leads me to believe that their
MX can pass large packets through their border router to you
without incident.

Another interesting test would be for the person having trouble
to send mail using your MX.  Have them transmit a message with a
sizable attachment to you.  (They can't relay to the outside
world, but they can send directly to you.)

If it only affects that user, perhaps they fouled up their TCP
settings in the registry.  Else suspect the ISP.

Again, can you provide tcpdump output?


--
Eddy

Brotsman & Dreger, Inc. - EverQuick Internet Division
Phone: +1 (316) 794-8922 Wichita/(Inter)national
Phone: +1 (785) 865-5885 Lawrence

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Mon, 21 May 2001 11:23:58 +0000 (GMT)
From: A Trap <blacklist@xxxxxxxxx>
To: blacklist@xxxxxxxxx
Subject: Please ignore this portion of my mail signature.

These last few lines are a trap for address-harvesting spambots.
Do NOT send mail to <blacklist@xxxxxxxxx>, or you are likely to
be blocked.