I have now rented a C2 server from Multiplay and it works quite good.
But (well there is always a "but") a lot of the server commands I know from Crysis 1 / Wars are not working anymore - such as:
g_nextlevel (too bad - so you can't switch to the next map ...)
rcon_connect (even more bad - you can't do anything from inside of the game)
Is there an official list of commands that actually work?!?
They managed to shut everything down that was of use in Crysis 1....