Something

G:\Projects\WoW Communicator\debug>"WoW Communicator.exe"
Invalid usage
Usage: <server> <port> <realm/world>

G:\Projects\WoW Communicator\debug>"WoW Communicator.exe" localhost 3724 realm
[*] Connecting to localhost:3724
[*] WSAStartup initialized.
[*] socket created.
[*] Host localhost is 127.0.0.1 (newby).
[*] Connected to localhost:3724.

Use help for a list of possible Realm packets you can send.
[SEND Client Challenge - CMD_AUTH_LOGON_CHALLENGE]
00 02 25 00 57 6f 57 00     01 0a 02 b6 14 36 38 78     ..%.WoW......68x
00 6e 69 57 00 42 47 6e     65 40 00 00 00 0a 00 00     .niW.BGne@......
98 07 50 41 55 4c 31 30     30                          ..PAUL100

[RECV]
00 00 00                                                ...


^C
G:\Projects\WoW Communicator\debug>