Subject: Re: Patch for timiting TCP MSS (i.e. for new PPPoE)
To: Rick Byers <>
From: None <>
List: current-users
Date: 12/03/2001 11:34:49
In message <Pine.NEB.4.33.0112031151580.4384-100000@Apenheul.BigScaryChildren.n
et>Rick Byers writes
>On Mon, 3 Dec 2001, Martin Husemann wrote:
>> Which still means you have to do it for each and every machine behind a
>> pppoe router. It's hard to cope from our understanding of standards
>> conformance, but we *realy* need a MSS clamping option for routers!
>I definantly agree.  Mike Pelley <>, is implementing
>in-kernel MSS clamping.  Anyone know if other OSes handle this directly in
>the TCP stack?  Since the problem applies to more than just PPPoE
>connenctions, and more than just ipnat setups - it makes sense to me to
>upport MSS clamping in the TCP stack directly.  However, I'm not aware of
>any other OS that does this.

Argh, shouldn't a hack like this go into the IPF stuff, alongside
NAT and the rest of that?  It seems kind of ugly to put this into 
the forwarding engine, when, last I checked, it just forwarded
packets and didn't otherwise molest them?