Sorry that this group is currently dead, but there are a couple of ways to host if you do not know how.

1: Port Forward 2302 on this website

http://portforward.com/

Dont ask me how to do it. Everyones Router is different, therefore the process is different as well.

2: I also believe that Tunngle works as well. Download Tunngle and create an account.

http://www.tunngle.net/

In the network search bar, look up Operation Flashpoint and join that network, That is the same network as ARMA: CWA (Which used to be called Operation Flashpoint, hence why it is essentially the same)

Get your friends to join that network and just have fun. I might plan on hosting soon but as far as i know everyone for CWA is inactive. Have fun making and playing missions though.

Best Regards,

Mackereldude