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Date:      Thu, 04 Mar 1999 19:20:45 -0500
From:      Matthew Hagerty <matthew@venux.net>
To:        freebsd-net@FreeBSD.ORG
Subject:   NATd and computer to computer via Internet
Message-ID:  <4.1.19990304190512.00a08900@mail.venux.net>

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Greetings,

If this is the wrong place to post this, please excuse me, but it seems on
topic :)

I have a cable modem and I'm running NATd on my FreeBSD box to provide
Internet access for my home network.  I also run ICQ on several machines.
The problem I am having is if someone tries to initiate a file transfer or
chat session via ICQ, it never goes through.  But, if I initiate the file
transfer/chat session it works.

Also, I have a friend that I helped get set up on FreeBSD with the same
set-up as me, but he is using a regular modem instead of a cable modem.
Now neither he or I can send ICQ messages to each other, we have to always
send them through the ICQ server.

From what I understand ICQ communicates directly between the two computers.
 But if both ends of the link are running NATd, how does NATd know which
internal machine to send the packets to?  Am I s.o.l on this?  I can
however communicate fine with anyone else who is dialed-up/directly
connected, I just have to always initiate the file transfers and chat
session though.


Thanks,
Matthew



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