On my linux box, i run netstat -l and i see xdmcp in the list but it doesn't have LISTEN as its state, see what it shows below, I'm wondering if this might explain why i can't see it in my exceed broadcast listing of servers broadcasting on our net? My unix boxes don't show this at all.
Proto Recv-Q Send-Q Local Address Foreign Address State
udp 36800 0 :xdmcp *:
what does this mean? is xdmcp supposed to be using the udp protocol? not tcp?