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Here are the steps to forward a shogo server through an IPCHAINS firewall.

1. Select a port (let's say 12345.)
2. Set the rules to accept these ports.

   # MY EXTERNAL I/F ADDRESS:
   $EXT=123.123.123.123/255.255.255.248
   # ALLOW TCP TRAFFIC:
   ipchains -A input -i eth1 -p TCP -s 0/0 -d $EXT 12345 -j ACCEPT
   # ALLOW UDP TRAFFIC:
   ipchains -A input -i eth1 -p UDP -s 0/0 -d $EXT 12345 -j ACCEPT
   

3. Now set the rules to forward them:

   # FIRST, CLEAR THE portfw RULES.
   /usr/sbin/ipmasqadm portfw -f
   # NOW FORWARD TCP TRAFFIC:
   /usr/sbin/ipmasqadm portfw -a -P tcp -L 64.220.136.26 12345 -R 192.168.1.3 12345
   # AND UDP TRAFFIC:
   /usr/sbin/ipmasqadm portfw -a -P udp -L 64.220.136.26 12345 -R 192.168.1.3 12345
   

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