I had a problem with playing an MP game with a D-Link DI-604 router. As I solved the problem with the help of a D-Link help desk officer, I place the solution here.
Warning: It opens all the ports for the time of the gameplay.
1. Open your web browser.
2. Choose http://192.168.0.1/ - it's the address of your router
3. type in "admin" as a login and leave password out blank during authentication
4. choose home>lan>client list to find your IP number
5. choose tools>misc
6. at "IP Address of DMZ Host" type in your IP number (the final part)
7. check "enable"
8. press "apply"
I hope this will be helpful to someone.
Warning: It opens all the ports for the time of the gameplay.
1. Open your web browser.
2. Choose http://192.168.0.1/ - it's the address of your router
3. type in "admin" as a login and leave password out blank during authentication
4. choose home>lan>client list to find your IP number
5. choose tools>misc
6. at "IP Address of DMZ Host" type in your IP number (the final part)
7. check "enable"
8. press "apply"
I hope this will be helpful to someone.