For almost a week now, I've been unable to play on any MP servers.
All servers have the same huge ping, and trying to connect to any one of them fails: "Connection to session lost or cannot be established. Session may no longer exist"



The game also lists the NAT Type as "Unknown", where previously, when I was able to play, it said "Moderate".

I'm on Windows 7 x64, Crysis 3 is allowed in the firewall (though even disabling the firewall entirely makes no difference).

It's not a problem with my connection in general, I can connect to servers just fine from my laptop.
I've tried to let Origin repair Crysis 3, but it reports no files replaced.

Here are the contents of my Game.log file, but nothing seems to be amiss: http://pastebin.com/wUFMkm7c

Any help or suggestions would be appreciated

Oh man... you must be playing from the moon

Could be a routing issue? Try putting your desktop machine in your router's DMZ and see if that clears it up. If so, it's a port forwarding / routing problem

Could be a routing issue? Try putting your desktop machine in your router's DMZ and see if that clears it up. If so, it's a port forwarding / routing problem

It was already in the DMZ - as opposed to my laptop.

It turned out to be a windows firewall problem after all - despite crysis 3 being allowed, AND the firewall being off (supposedly), stopping the firewall service finally eliminated the problem...

Glad you got the problem sorted melak