DDNS useless without bridge modem

[Jehk]

My ISP upgraded me to 15 mbit VDSL2 which means they sent in a new extremely firmware crippled gateway modem which has every feature disabled and I had to beg the tech support to TR-069 and enable DMZ [smh]
Now that I'm stuck using a DMZ rather than a bridge, I can't use DDNS features on Asuswrt-Merlin because for whatever strange reason, I get the error:

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 cannot understand why it doesn't do an external IP check through http://checkip.dyndns.com/ or somewhere.

So I'm either stuck nano'ing some files in SSH on the router to hack an external IP check in somehow, or buying a modem from china that may or may not work with my ISP. >.<

Can you please add this feature?

 

[test011]

Asuswrt's ez-ipupdate is very old and lacking much features. There is no force update, does not provide versatile way to determining external IP, unike ddclient. I think ez-ipudate only uses interface command like ifconfig to determine its WAN IP. Where ddclient can use HTTP to server like checkip.dyndns.com, runable srcipts, and traditional interface commands.

As long as Asuswrt uses ez-ipudate as the default ddns client, I don't think there is any way you can do what you want. Maybe you can try opt/entware and install ddclient and manually set it up. I am a very long time self-compiled openwrt user and new to Asuswrt, and very disappointed with its ddns client, ez-ipupdate.