Make sure you have Internet access with this router. Test whether you can access from a remoter computer by WAN IP address of the router: port number.

Also need public IP to make forwarding work properly

Hi

I Have a Router Wireless N 3G/4G TL-MR3220, Port Forwarding and Dynamic DNS not work with USB Modem 4G. Only works with internet by WLAN Connector.
I have internet with USB Modem 4G and have public IP.
It's the big bug. Please fix this bug, it is very important to me.

Miss Lucky wrote

Make sure you have Internet access with this router. Test whether you can access from a remoter computer by WAN IP address of the router: port number.

how about changing another modem to validate? maybe you can contact your ISP to confirm.

Same problem here.

When connecting via 4G/LTE, port forwarding does not work. Switch same modem via Dashboard interface (connect 4G directly to usb port on pc and use modem build in software to configure 4G modem not to autodetect but to 3G only) and plug back into TP-Link 3420 v2 and Dyndns and Port Forwarding works. Connect via LTE and dyndns and Port Forwarding does not work anymore. Same modem - different protocol Bug lies with Tp-Link Firmware.

Please correct this. I have now loaded Openwrt and all is well. I hope that Tp-Link will fix this soon as for I want the original Firmware on my device.

Same problem here! It cost me 2 days of error searching until I found this topic here that the problem is the firmware. Port Forwarding and Dyndns are not working for MR3420!!!

Has this bug been fixed already, or should I buy some other brand?

I'll need to have an access to my security computer at remote location where 3G is the only Internet connection. Having dynamic dns would be critical.

Hi.
Can you login the web page of the router, and then post the screenshot about Status, Virtual Server and Dynamic Dns pages?

Hi all,

Same problem here TP-LINK MR-3420

Region : Portugal
ISP : OPTIMUS (26803)
Modem 3G/4G: Huawei e932u-12

Firmware Version: 3.13.27 Build 121206 Rel.60215n
Hardware Version: MR3420 v2 00000000

Dynamic DNS and port forwarding not working.

Please advise.

If someone has it working (DynDNS and port forwarding) even with other firmware, could please post the solution?

Best regards

Best regards

Hi to everyone,

same problem on TL-MR 3220 connected to 3.75 G network.

Has someone already fixed this bug or any procedure to do ?

Anyway, if any firmware upgrade is needed I haven't seen anything so far. My firmware version in V2.

Would anyone be so kind to give any advice?

Thanks in advance.

Regards