Game Port(s) 
Crysis  requires  the default game port  to be open  in  order  to  communicate properly with  the master 
server. Following  is  a  list  of UDP and TCP ports  the game uses  in  the  case  of problems with  your 
server not being listed online. 
 
For all traffic between server and client the default 'game' port 64087 is used. 
 
                                                                                          Ports 
Service                   Hostname                              Type  Local    Remote 
 
Server: 
hbmaster3                 crysis.available.gamespy.com  UDP   Any   27900 
natserver1               natneg1.gamespy.com  UDP   game   27901 
natserver2  natneg2.gamespy.com  UDP   game   27901 
nat neg   Game client   UDP   game   game 
hbmaster3   crysis.master.gamespy.com   UDP   game   27900 
Incoming queries  Game client                UDP   game   Any 
keymaster  key.gamespy.com         UDP   game   29910 
Stats auth  crysis.auth.pubsvs.gamespy.com        TCP   Any      Any (def:443) 
Stats   crysis.comp.pubsvs.gamespy.com  TCP   Any      Any (def:80) 
Profile settings/stats  crysis.sake.gamespy.com               TCP   Any      Any (def:80) 
 
*Default value for 'game' is 64087 (can be adjusted). 
For incoming UDP traffic, only port "game" (default 64087) is required to be opened.