I looked through your router config pages, though I can't read the pages themselves, you want to go to the one that is captioned thusly:
This screen is used for opening ports in the firewall for proper operation of "special applications", which range from teleconferencing software to hosting your own game server"
For cs, you will want to "open" ports
27000-27016
27020
27030-27040
I can't speak for wrcraft, but as my son hosts starcraft and D2, we have ports
28960 and 20500-20510 opened to his comp and I believe Warcraft may be the same.
An internet (google) search such as "open ports warcraft" would reveal it to you.
UPDATE: as a matter of fact, following my own advice above about the google search turned up
this site which you may find helpful.
-looked to be a step by step tutorial for opening ports in a firewall for warcraft.