In both Torchlight 2 and Dead Space 3 I get the message "Strict NAT Detected". I can play online in Torchlight 2 but it's slow. Dead Space 3 can't connect to other players at all.
I've forwarded the ports posted by EA for Dead Space 3 (source):
TCP: 80, 443, 9988, 20000-20100, 22990, 17502, 42127
UDP: 3659, 14000-14016, 22990-23006, 25200-25300
I also forwarded the ports posted on portforwarding.com
In Torchlight 2's local settings file I've also added a UDP PORT. (C:\Documents and Settings\Username\My Documents\My Games\Runic Games\Torchlight 2)
Both games are allowed through the Windows Firewall and Microsoft Security Essentials. UpNp is activated and I have the Thomson-Alcatel TG789vn router.
I tried using 3G with internet sharing using my iPhone and the errors are gone, though I can't use it since it's too slow.
Still I get the message in both games. Is there anything else I could try?