>You might not have the right router for this kinda of application. Have you set up any virtual server or port forwarding or application rules for the port your trying?
It worked even in 10yo linksys router.
HW version A1
FW version 1.02NA
I tried to forward all UDP on ports 1024-5000,5004,5005 to my host. But this didn't help. Otherwise, no forwarding or Application rules.
ALG options under Advanced/Firewall are all on. But mms option isn't there.
I also tried to dump all IP traffic with tcpdump with and without the router. I don't see any UDP packets coming in or out. Only TCP packets on 1755. and TCP connection gets stalled for some reason with the router present, like router doesn't pass some packets. So port forwarding and app rules shouldn't even matter.