Subject: Re: Patch for timiting TCP MSS (i.e. for new PPPoE)
To: Martin Husemann <>
From: Rick Byers <>
List: current-users
Date: 12/03/2001 12:12:35
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've been dealing with completely clueless firewall admins at a client
> for a few weeks now and just punted.

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.