About 1 week later Crytek announced that they will not support Crysis / Crysis Wars / Crysis 2 PC MP anymore.

I'm sure they wouldn't have problems to solve this Crysis MP servers problems but just don't want to. So this is what they have posted on 11th of April :

There has been a bit of discussion surrounding the ceasing of operations at Gamespy, and we wanted to take the opportunity to clear the air a bit as it were, by providing some informaiton on the whole topic;

As of May 31 this year, the multiplayer modes in Crysis and Crysis 2 for PC will no longer be playable. The conclusion of online multiplayer support comes as a result of GameSpy Technology shutting down all their hosting services. GameSpy have been providing multiplayer functionality for Crysis and Crysis 2 since they launched. The single-player campaigns in both games are unaffected by this transition, and the multiplayer mode in the Xbox 360 and PlayStation®3 versions of Crysis 2 remain playable.

We'd like to thank everyone who has taken up arms in Crysis and Crysis 2's multiplayer modes in the last few years, and apologize to the small but dedicated community of PC players who are still actively competing against one another.

So I guess we really are on our own now. Own MasterServer with ideas of programmers of our community - maybe this is the only way. Or maybe Crytek or EA will try to help us with that. We have to wait and see.