Wednesday, November 5, 2014

FIX: T-Mobile Wireless (WiFi, not 3G) CellSpot / ASUS TM-AC1900 Port Forwarding Not Working

Problem
You try to forward ports on your new $25 deposit ASUS Wifi awesome-router and it doesn't work. Neither does UPNP. Or maybe it works but not for very long.
What's happening
Those clever folks at ASUS added a NAT acceleration capability. Unfortunately, as best I can tell, it basically does nothing much better than crash regularly. This is why you may have noticed that forwarding works occasionally after reboot. I, personally, found this to be very rare. I've also found that the NAT acceleration isn't noticed when it's disabled. I don't have Google internet, but I'm pulling 80/20 and the router is doing fine.
Fix
Go to LAN -> Switch Settings. It will probably hang. Worry not, your router probably just crashed. You likely lost internet. Give it a full minute and refresh.
Go to LAN -> Switch Settings. Set any setting that has the word Acceleration (or NAT) in it to Disabled. Your router will reboot and your ports will be forwarded.

Update: Around December, for no apparent reason, my NAT rules all stopped working again. Nothing had changed on the router (well, as far as I know ... we rarely need that functionality). See the comments for what I did to repair, but I'll summarize: Factory Reset and some other steps.
I couldn't find better information to help with this, so I went nuclear and blew away the entire configuration. It worked, but ... yuck!

4 comments:

Lonny Kole said...

having the same problem cannot port forward through the cellspot router when i try to log in remotely get sent to the user interface for the router rather than my IP camera other than port 80

reyrios said...

I am having the same issue, but disabling NAT accelarion didn't help in my case. Any other ideas?

reyrios said...

I am having the same issue, but disabling NAT accelarion didn't help in my case. Any other ideas?

Anonymous said...

AWESOME! thanks! i have a bachelors in information systems and this was driving me crazy. simple fix. thanks!