just tried with a DG834GT with both DGTeam and Netgear Firmware and still "socket connecting"
@ AR545 - what router you having success with?
@ ASBOKID - is there no way of forcing the router to listen on that port (unfamiliar with it myself)
edit: tried creating services on port 5100-5102 on UDP and then allowed them in firewall rules, both ways and results are same
edit2: tried adding an ALG Service on UDP port 5100...no joy