I'm using the Huawei modem and a TP-Link WR340GD router and just like the title says, I'm unable to forward the above port range (UDP traffic only). I used the PFPortCheck utility to test if the ports have been forwarded correctly.
I even tried DMZing my router, and connecting my modem without the router, but no luck. The TCP ports forward fine, it's just the UDP traffic that's stuck. Due to this blocked port range, I'm unable to play any Steam games, (27000-27050) UDP. Any ideas what's going on? Can anyone with a Huawei modem replicate these issues?