There can be particular issues related
to playing through a router or firewall,
including sharing your internet
connection via another PC. In order to
join or host a Conflict: Global Storm
game from behind a firewall you must
open the following ports (inbound and
outbound):

UDP ports 4658, 6500, 10010,
13139, 27900

TCP ports 4658, 6667, 28910,
29900, 29901, 29920

To host a game from behind a router
with NAT (Network Address
Translation), or a firewall, you will
need to enable ‘port forwarding’ on
the following ports to route data to the
IP address of your PC;

UDP ports 4658, 6500

TCP port 4658

If you continue to have problems
connecting to servers or creating
them, try bypassing your router or
firewall by connecting your PC directly
to your broadband connection.

If possible make sure you or your friends are not behind NAT or firewall. It is much easier to connect if you have all public IPs and not something starting with 192.168...

Do not use ALT+TAB and do not enter Windows when multiplayer is running. It will kill the connection to GameSpy servers that are needed even when you are creating server to your own computer.

Sometimes in the lobby the server just dies quietly and you need to the restart the whole game. You will notice this when players just stop coming to your server. This usually happens because you switched to Windows even for one second and sometimes it just happens without any reason.

A mi me dice se ah interrumpido los servicios en linea para conflict global storm ayuda