@ToxicShock
It's possible to allow connections to other ports (for example some "common used" ports which won't be blocked by any firewall, but which isn't used in C&C:Online) when port 6667 is blocked?
Because I have many friends with similiar issues... so for now they can only play with LAN emulators....
Plus it seems like that local port redirection is possible... So if you can do smth like when C&C:Online Launcher detects that 6667 port is blocked, redirect the game connection to the alternative port, it would be really great...
The game would have to be "cooked" to try to connect to another port (which would be pretty difficult to do) and then that would have to be implemented at our end (or a way found of tunnelling out of the restricted LAN). I think that that is going to be too much of a problem to implement.
I don't know really anything about networking...so what I might say probably means nothing or wouldn't make sense. (If I knew what to research on the topic I would, but frankly, I don't know where to start). I do recall that the old online service did rely on several ports. I don't know what each of those ports did, but I did know there were a few that were used. (I have a feeling that this is basically Viper's question, but I'll see) Would it be possible to work with one of the old ports that the service used?
On another note, I recall having to set a port on a few of the games I played with friends using hamachi...I believe it was 25565 for the port...I doubt this will mean anything, but I'm just trying to think of everything I can.