Online problems

When i try to host a game online nobody is able to join me. It's also very hard to connect to an online game.
My connection is good and disabling my firewall also doesn't work. What can I do?

open the ports

viewtopic.php?f=8&t=8453

Yes i tried that and also put my firewall off, but still nobody is able to come in my game

same me..

Which version do you have ?

I have the most recent patch installed