manually port forwarding for my router

[AdamN]

I forgot which VPN that has issue, but i remembered the game was Phantasy Star Portable 2

Anyway, most adhoc games need open ports on all the players since adhoc worked like P2P regardless who the host was, unlike online PC games where all Client players will communicate through the Server/Host Player instead of Client to Client.

For example, most adhoc games will do this during gameplay, if there are 4 Players (regardless who the host)
1P will send/receive data to/from 2P, 3P, 4P
2P will send/receive data to/from 1P, 3P, 4P
3P will send/receive data to/from 1P, 2P, 4P
4P will send/receive data to/from 1P, 2P, 3P

And in order to be able to receive data, that player must have open port, so if both side have blocked port, both won't be able to communicate properly.