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Subject: Re: can't transmit files larger than about 1K to remote machine
From: Hauke Johannknecht <ash,AT,ash,DOT,de>
Date: Thu, 19 Oct 2000 21:26:35 +0200
In-reply-to: <Pine.LNX.4.10.10010191432140.21342-100000@welles.cjc.org>

On Thu, 19 Oct 2000, Cheng-Jih Chen wrote:

> Thanks.  The smaller MTU seems to work.  At least somewhat: the linux
aehm, lowering the MTU should be considered a part of debugging,
not of the solution.

> Oh, I have ip_always_defrag set, but I'm not masquerading, so it shouldn't
> have any affect.
well. it could even worsen the situation.

you should check if you filter ICMP somewhere. most MTU-problems
are caused this way. filtering ICMP breaks PMTU-discovery.
so you should disable PMTU-Disc or let the ICMP-frag-needed pass.

Gruss,
  Hauke

-- 
Hauke Johannknecht        Berlin / Germany        HJ422-RIPE
Use PGP ! -> lynx -dump http://www.ash.de/ash.asc | pgp -kaf





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