After a bandwidth upgrade, my ISP required me to use a new modem device, which is a modem/router hybrid — contrary to my old device, which was modem only.
The old modem-only device provided the connected (dd-wrt-enabled) router with the WAN IP address, which then could be used with the router's intern Dynamic DNS (DDNS) service.
With the new hybrid device (10.1.9.1) this approach isn't working anymore, since the connected router now has a LAN IP address (10.1.9.2), which it tries to use with the DDNS service.
The router's Dynamic DNS outputs following message to log, as you can see the local IP address 10.9.1.2
is used.
Wed Sep 2 22:03:53 2015: INADYN: Started 'INADYN Advanced version 1.96-ADV' - dynamic DNS updater.
Wed Sep 2 22:03:53 2015: I:INADYN: IP address for alias 'sub.domain.com' needs update to '10.1.9.2'
note: sub.domain.com
is not the real domain
Question
Are there ways to get DDNS working on a router that is connected to the internet, but has not been assigned a WAN IP?
Additional Information
- The hybrid device, which is an Ubee EVW3226, does not support DDNS
- It has an OEM firmware with a simpler interface and reduced options
- It can't be replaced (without renting an uber-expensive alternative)
- Related question I asked some month ago: How to link two routers LAN to WAN