If you want, I could look at it in my packet sniffer and see what, if anything, is sent. I'd need to know what port it uses though.
My guess is port 80. But when I get a chance I'm going to add some indicators to the server display like:
- "minutes and seconds since last advertisement sent"
- "minutes and seconds until sending next advertisement"
- and probably "the master server was listing this (minutes, seconds) ago" (and rechecking that every few minutes or whatever)