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Date:      Tue, 28 Aug 2001 22:51:10 
From:      "Joel Rosenberg" <thisisjoel@hotmail.com>
To:        freebsd-ipfw@freebsd.org
Subject:   Forwarding packets from the internal network
Message-ID:  <F247Ctgx8VUkRacUtI900014d9b@hotmail.com>

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I'm in the process of setting up a network and have run into some problems. 
I have two devices on my network (IP's 192.168.1.20 and 192.168.1.21) that 
are accessed via port 80 (non changeable). Right now, I have all traffic 
sent to my firewall (I only have one real IP) on port 80 forwarded to 
192.168.1.20:80 and all the traffic to 81 sent to 192.168.1.21:80 via natd. 
The problem is, when a connection from the outside is made to 192.168.1.21, 
it responds by trying to open a new connection on port 80. When the outside 
computer connects, the firewall forwards the now-port-80 connection to 
192.168.1.20, leaving no way of reaching 192.168.1.21. I've tried forwarding 
traffic from higher ports to internal machines (ie ssh) with success, so I 
can only assume that when 192.168.1.21 gets a request, in opens up a new 
connection, thereby losing the original :81->192.168.1.21:80 forwarding.
   Is there any way I can set up the firewall so that all outgoing traffic 
from 192.168.1.21:80 leaves the firewall on port 81?

Thanks
Joel Rosenberg

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