from the readme.txt after install. seriously you should read these things.
==================================================================
NAT/Firewall
==================================================================
Game Port Usage
For all traffic between server and client 'game' port is used
(default 64100 - net_lobby_gamespy_online_port).
Ports
SDK Service Hostname Type Local Remote
Available hbmaster3 crysis2.available.gamespy.com UDP Any 27900
NN natserver1 natneg1.gamespy.com UDP game 27901
NN natserver2 natneg2.gamespy.com UDP game 27901
NN nat neg Game client UDP game game*(other game)
QR2 hbmaster3 crysis2.master.gamespy.com UDP game 27900
QR2 Incoming queries Game client UDP game Any
CDKey keymaster key.gamespy.com UDP game 29910
SAKE Profile settings/stats crysis2.sake.gamespy.com TCP Any Any (def:80)
Chat Any IRC server peerchat.gamespy.com TCP Any 6667
GP gpmanager gpcm.gamespy.com TCP Any 29900
GP searchmanager gpsp.gamespy.com TCP Any 29901
SB gmaster3 crysis2.ms5.gamespy.com TCP Any 28910
SB Server queries game servers UDP Any game*(target server)
RSS RSS Feed lb.crysis2.ea.com TCP 80 80
Default value for 'game' is 64100 (can be adjusted).
For incoming UDP traffic, only port "game" ( default 64100)
is required to be opened.
haha never had too read those....always a first time.
thanks. 
hmmmm never had to adjust my router before, but i tried some ports, no luck.
64100 is open. any ideas comrade? i use a thomson speedtouch 780.
haha never had too read those....always a first time.
thanks.
hmmmm never had to adjust my router before, but i tried some ports, no luck.
64100 is open. any ideas comrade? i use a thomson speedtouch 780.
It is open for what? UDP? TCP? Incoming? Outgoing? Those are the other things you need to keep in mind.
You can try opening 64100 for all and see if it works. If it works, close things off 1 at a time. If it doesn't work, leave them open until you find the problem.
You can try disabling the router's firewall entirely for a short period of time. See if that works or not but remember to turn it back on after you test it.
Here is a link to the router user manual if you need it. Lookout, it is slow. PDF file server is located over the big pond.
http://www.cerberusnetworks.co.uk/PDF/780wl_userguide.pdf
thanks beta, but i did put 64100 open for all, no luck.
the firewall menu in the thomson is not there, because our internet provider(kpn) have a different firmware without the firewall symbol.
i read online in forums that you can not update this firmware of modify to a normal 780 speedtouch so i have to do it with the portforwarding..... its strange i did open in first crysis the game port also and never had troubles.
so totally disable firewall in the modem/router isnt possible...grrrrrrrr
EDIT:
i removed norton 360 and disabled windows 7 firewall instead.
then i dont get that fricking warning about strict firewall and i find 1 server 
(are there more already?)
when i turn windows 7 firewall on and no change so far so good
then i reinstalled norton 360 and bam BLOCKED!
in firewall menu i did give crysis permissions, and now i do get a warning but also that same server
now wait untill more servers pop up.
i suggest nod 32 smart security for you. to port range forward
port: 64100
protocol: UDP you may try both if that doesn't work
you will not have a source net option like i do, but refer to the pic below.
I use Norton Internet Security and have no problems.
There are tons of servers. I mean there are like hundreds to sift though on my Crysis 2 multiplayer. Maybe you need to check if it is displaying Local/Internet and also "refresh server list" or something like that in the game.
icomrade and beta, thanks for your assist,
yesterday no servers and today i got that warning again but.....all servers show up?
so... i can play.....
EDit: played for 2 hours, got bored already hahaha
waiting for power struggle maps....or osf server.
Thanks again guys.
hmm, there is no lan option, otherwise we would play through tunggle or hamachi i would think, because the game is fun when it's fair and competitive. it isn't fair when it's dominated by cloakers and campers.
