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Date:      Sat, 15 Jul 2000 15:10:41 -0400
From:      Dan Flemming <danflemming@mac.com>
To:        doc@FreeBSD.org
Subject:   Suggested addition to PPP FAQ - solution for Macintoshes and Black Hole  DSL routers
Message-ID:  <3970B730.C4D28290@mac.com>

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At http://www.ca.FreeBSD.org/FAQ/ppp.html#AEN3716 you have some advice
for Win9x users connecting through a FreeBSD box that's running PPPoE
and NAT. Well, Macs have the same problem (the default MTU on MacOS 9 at
least is 1500), but a different solution, which I just found. :)

There's a program called OTAdvancedTuner (OT for OpenTransport, the
MacOS TCP/IP stack) made by a company called Sustainable Softworks, http://www.softworks.com/
The program is shareware, $15 US I believe (haven't registered yet, just
got it), with a 21-day tryout period. It allows you to configure a bunch
of TCP/IP settings on the Mac. The relevant one for the black hole
problem is ip_interface_MTU; Mac NAT users should select that from the
drop-down menu, enter 1450 instead of 1500 in the box (it allows up to
64000, imagine that :) and then click the box next to Save as Auto
Configure and then click Make Active. This seems to have solved my
current problem...


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