Then it must be a UDP issue:
<Menu>
Escape key will take you back to here.
0 : Exit
1 : Wait for access
2 : Try access
3 : Spectate
4 : Broadcast
5 : Get Information
6 : Try access ( Tough )
7 : Standby
8 : Test myPort
9 : debug( 127.0.0.1 )
Input [8] >8
Input Target IP [0.0.0.0] >208.83.220.135
<Report>
Port : OK ( UDP.7500 received signal )
Those firewall settings look to be in order, so I'm guessing it's router settings or something.
http://www.portforward.com/