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Date: Wed, 9 Apr 1997 06:58:32 -0500 (CDT)
From: Jimbo Bahooli <moke@fools.ecp.net>
To: Eivind Eklund <eivind@dimaga.com>
cc: freebsd-questions@freebsd.org
Subject: Re: ipnat + natd
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> 
> > I have tried both ipnat (ipfilter) and natd (from www.srv.net/~cmott) for
> > ip aliasing purposes. Both have worked somewhat to a degree.  However,
> > both went extremely slowly, 20bytes/sec was about averaged for any host
> > behind me.  Also tcpdump would spit out ip reassembly time exceeded
> > messages. I am wondering if anyone else has had this problem. The connect
> > to the internet is 28.8 ppp, and ethernet for the aliased hosts. The
> > kernel is 2.2-STABLE and the newest ipfilter and natd are being used.
> 
> This is strange.  I'm running the same aliasing code as natd (using 
> user-land PPP) and get about 3KB/s from aliased hosts.  What kind of CPU 
> power have you got?  (I'm aliasing about 20 hosts on a Pentium 150, which 
> is also running as a file/printer/CPU-server, without any noticable load) 
> 
> Eivind Eklund <perhaps@yes.no>
> http://maybe.yes.no/perhaps/


ppp -alias did not exhibit this problem. Which I thought was odd because
of how natd + ppp -alias shares the same code.  Its a p90 and only aliases
about 5-6 hosts at most. I have thought of two ideas, my current mtu/mru
is 296/296 I might try raising that to see if that has any effect. And I
also was told to try disabling tcp_extensions in sysconfig.