[Server query port]

You can change the query port in UDKGame/Config/UDKEngine.ini. Search for "QueryPort=27015" line. Changing this value works. Not sure if this is a proper way of doing it though.

[Server query port]

It responds to Source query protocol at UDP port 27015.

This doesn't changes it: -QueryPort=. In fact it doesn't changes anything in socket bindings.

None of these ports (except 27015) reveals something interesting in HLSW, so Source is the way to go.

C:\WINDOWS\system32>netstat -nao | findstr 22884

TCP 0.0.0.0:7779 0.0.0.0:0 LISTENING 22884

UDP 0.0.0.0:7778 *:* 22884

UDP 0.0.0.0:7779 *:* 22884

UDP 0.0.0.0:13000 *:* 22884

UDP 0.0.0.0:27015 *:* 22884

UDP 0.0.0.0:41765 *:* 22884