To enable Falcon 4.0 multiplayer connection through a linux router 
or firewall with the 2.4 series kernel make sure iptables is 
installed (it is by default) and loads on machine startup.  Just 
type in the following commands or put them in a startup script.  The 
first ip address is your external address, eth1 is the interface for 
the external address (yours may be different, eth0, for example.  
Use /sbin/ifconfig to find out).  The second address will be the 
address of the machine on which Falcon is being played (your address 
may be different, use winipcfg).  This has been tested on Redhat 7.2 
but should work with any 2.4 kernel.

/sbin/iptables -t nat -A PREROUTING -d 24.188.53.16 -p tcp --destination-port 2934 -i eth1 -j DNAT --to 2.168.0.202:2934

/sbin/iptables -t nat -A PREROUTING -d 24.188.53.16 -p tcp --destination-port 2935 -i eth1 -j DNAT --to 192.168.0.202:2935

/sbin/iptables -t nat -A PREROUTING -d 24.188.53.16 -p udp --destination-port 2934 -i eth1 -j DNAT --to 192.168.0.202:2934

/sbin/iptables -t nat -A PREROUTING -d 24.188.53.16 -p udp --destination-port 2935 -i eth1 -j DNAT --to 192.168.0.202:2935