HowTo: Capture the appropriate packets between the client and the server

To only capture the packets necessary for analysis of the game protocol (i.e. not the chat protocol), you can use the following pcap (e.g. Wireshark) filter:

!broadcast and !multicast and udp and !port 53 and !port 59511 and !port 161 and !port 2900 and !port 5355