How to get external IP Address from AC66U

[toolbox]

Hello

I installed latest 3.0.0.4.260.21 (Merlin Build) on a RT-AC66U

When I go to WAN - DDNS I have the following message :

The wireless router currently uses a private WAN IP address (192.168.x.x, 10,x,x,x, or 172.16.x.x).
This router may be in the multiple-NAT environment and DDNS service cannot work in this environment.

I would like to update my account on DNSOMATIC but it's not possible if I do not have the correct external IP address.

On Shibby's TomatoUSB, there is an option in DDNS :

Use External IP Address Checker (every 10 minutes)

This option retrieves the external IP Address and correctly updates DNSOMATIC (or any other DDNS service)

What should I install on the RT-AC66U to get my external IP Address and update DNSOMATIC like TomatoUSB ?

 

[bobloblaw]

Do you also have a NAT modem, maybe your modem is also a wireless AP. I had this same issue but my isp flashed my provided modem to bridge mode which resolved the issue