> I'am preparing to use iptables. I read documentations, manuals, howto's but > still have'nt answers for > 1/ what internet games will work throught the iptables NAT? As long as you don't need to run servers, just about all of them. > 2/ what internet games will NEVER wokr throught iptables NAT ? As per above, those that require server-like behaviour will require special modification of the firewall to forward the appropriate ports. There's nothing that can't be made to work with sufficient effort. > 3/ what internet games need additional moduls to work ? None yet. However, as there are several 'utility' protocols that transmit the IP address in some form in the data section of the packet, they need modules (FTP, IRC, etc.). A game could be made to do this, but there's really no practical reason to do so. > 4/ some example of iptables rules, that make internet games work ? Well, if you need to run, for example, a Counter-Strike or Half-Life server behind the firewall (assuming default port configuration): iptables -t nat -A PREROUTING -i $EXTIF -d $EXTIP -j DNAT --to-destination $SERVERIP
with all the variables defined like this or similar: EXTIF=eth0 EXTIP=123.45.6.7 SERVERIP=192.168.0.5 -EtherMage
