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I noticed my TP-Link MR3220 3G/WiFi Router port forwarding will only work when I use the WAN port and not the 3G connection (modem).
Technically the router offers an option to use the Internet from 3G, WAN or both (given a priority). In my case I am only using 3G and apparently, the router features such as remote management and port forwarding don't work on this interface.
Can anyone confirm this? If so, is there any workaround (static routing or something)?
I have tested a 3G dongle, it is given a public IP address and after putting appropriate forwarding entry, traffic comes to my machine when 3G device is directly attached to my computer, However when using device on my router TP LINK MR3420, the traffic is not forwarded, because TP links only appears to forward traffic from WAN interface and not the 3G/4G interface... – Ahmed – 2016-04-03T14:38:30.973
1It's most likely not the router, it's the 3G network. The traffic is never getting to the network because the 3G network has no idea how to route it. – David Schwartz – 2012-03-07T07:44:29.397
I did not understand your comment. Once my router uses my 3G modem to connect to the Internet, I get a specific IP address. You mean the 3G provider won't route packages (such as ping) to this IP address? – Jonas – 2012-03-07T18:07:08.917
1Yes, that's exactly right. In fact, the IP address you "get" may not even be unique to your device. – David Schwartz – 2012-03-07T22:30:59.507