Hi !

I've got the problem that I don't have a direct connection to the internet. The Firewall used here blocks some specific ports - especially gaming und p2p ones...
Well, but I'm an administrates of a rootserver (suse) and I think there should be a chance to use a tunnel or something like that to able to play games like counter-strike behind my firewall@home. But I don't have any clue which tools I need to do it ? Are there any hints for me ?

Thx in advance....

You need to setup IPTABLE rules to allow specific ports to be forwarded to your machine behind the firewall.
Examples:

# DirectX Game hosting 10.x.x.x is the game server behind the firewall
#$IPT -t nat -A PREROUTING -p tcp -d $INETIP --dport 2300:2400 -j DNAT --to-dest 10.x.x.x
#$IPT -t nat -A PREROUTING -p udp -d $INETIP --dport 2300:2400 -j DNAT --to-dest 10.x.x.x
#$IPT -t nat -A PREROUTING -p tcp -d $INETIP --dport 47624 -j DNAT --to-dest 10.x.x.x
#$IPT -t nat -A PREROUTING -p udp -d $INETIP --dport 47624 -j DNAT --to-dest 10.x.x.x
#$IPT -t nat -A PREROUTING -p tcp -d $INETIP --dport 6073 -j DNAT --to-dest 10.x.x.x
#$IPT -t nat -A PREROUTING -p udp -d $INETIP --dport 6073 -j DNAT --to-dest 10.x.x.x