only those are required if you'd like to have direct ip games
DirectPlay 8 Ports
2300..2400 UDP inbound and outbound
6073 TCP inbound and outbound
make sure you have 2300-2400 defined as udp portrange.
a friend of mine who should have enough knowledge about networks did exactly as stated in the help file but he couldn't host either. maybe thats related cause i have a tool installed called dxport which reduces and restricts port usuage to only a few ports of ten.
LinkEven if it isn't stated in the compatibility list. This tool is also compatible with dxport. they have a nice forum just for port forwarding with routers over there. maybe you can get better help over there with experienced ppl in this matter.
DOCa Cola