[AC68U] USB modem connection and UPnP doesn't work?

[Nazgulled]

I have Dual WAN enabled with my USB 4G modem as a secondary WAN and no connection at all as the primary WAN. This is the only way I can get my USB 4G modem to work with my AC68U running Merlin's 374.43_2. Newest versions don't work at all.

However, I believe that most of the settings in the WAN page are completely ignored by the USB modem connection, namely UPnP (another one is DNS). This sucks because it limits my online gaming experience.

How do I know that UPnP is not working. Well, I installed uTorrent, configured to use UPnP and a random port, started downloading something large and watched the System Log » Port Forwarding tap. Nothing appears. Refreshing didn't help at all.

So, is there a way to make this work?

 

[Nazgulled]

I just noticed this:

admin@RT-AC68U:/tmp/home/root# nvram show | grep upnp
vts_upnplist=
upnp_max_lifetime=86400
wl1_wmf_ucast_upnp=0
size: 48163 bytes (17373 left)
upnp_ssdp_interval=60
upnp_clean=1
upnp_clean_interval=600
wl0_wmf_ucast_upnp=0
upnp_port=0
upnp_min_port_int=1024
wan0_upnp_enable=1
wan1_upnp_enable=0
wl_wmf_ucast_upnp=0
wan_upnp_enable=1
upnp_max_port_int=65535
upnp_clean_threshold=20
upnp_min_port_ext=1
upnp_enable=1
upnp_max_port_ext=65535
upnp_min_lifetime=120
upnp_secure=1
upnp_mnp=1

Maybe the issue is within wan1_upnp_enable=0? Can I assume this is a valid setting that the Web UI just doesn't expose? How can I change it and persist it across reboots?

 

[Nazgulled]

Yep, that was it. I just did:

nvram set wan1_upnp_enable=1
nvram commit

Followed by a reboot and now System Log » Port Forwardng displays all open ports by my torrent client and online games

Please let me know if there's any problems with that I did above...

 

[Nazgulled]

Ok, sometimes my System Log » Port Forwarding table is empty even when I'm downloading a torrent with random ports and UPnP enabled. The downloads are ate full speed - so I'm assuming UPnP is working - but the port forwarding table is empty. Is this supposed to be like this? Can anyone please confirm me if I'm doing things right or wrong?

 

[Nazgulled]

Anyone?