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From: "Brent Wiese" <brently@bjwcs.com>
To: <freebsd-questions@freebsd.org>
Date: Wed, 9 Jul 2003 14:19:28 -0700
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Subject: RE: NAT and MTU
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> In the last episode (Jul 08), Brent Wiese said:
> > I have a machine that is being double-NAT'd.
> > 
> > Would it make sense to set the MTU lower to account for the NAT 
> > overhead?
> > 
> > It makes sense to me as I know MTU, but I like to check in case my 
> > thinking isn't right. :)
> 
> There is no overhead; all NAT does is rewrite IP addresses in 
> the header (and in some data packets of certain protocols 
> like FTP).  It adds no extra data.
> 

I never messed w/ NAT enough to have learned this. There's always something
to learn!

Thanks to all who responded.

Brent