Not able to setup DDNS in the wireless router

Question

I recently bought ASUS RT-AC51U. So, I tried to setup DDNS in the router to create a VPN. But when I tried to setup DDNS, it is showing this 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 am using a local static address for internet connection which was provided by the local ISP. As I can understand from the error message that the ISP already uses a router/modem which has uses NAT.

So what could be the solution to setup DDNS in my router? Also I don't have access to ISP router/modem.

Solution

I had the DOUBLE NAT problem with the ASUS RT-N56U connected to a Dlink Modem/Router when i was trying to use the AIDisk feature to access my USB hard drive via FTP. I couldn't use DDNS service, the router displayed this message : "This router may be in the multiple-NAT environment and DDNS service cannot work in this environment.''

I solved it by using "Bridge" type of connection on the Dlink Modem/Router, then setup the ASUS Router on PPPOE connection type using the Username & Password provided by ISP.

UPDATE:

To set Bridge connection type on your modem, you'll have to reconfigure your modem, either reset it to default or simply remove the current configuration, during configuration when you are presented with "type of network protocol" or "Connection type" such as "pppoe" , "ipoe" ,"Bridge", then select "Bridge" and continue to the following steps. If you don't know how to configure your modem, google the model of the modem you'll find a guide on how to do that. because each device has different interface.

Comments

[Burgi]

Could you expand on how the OP should put their device into bridge mode? Please see How to Answer and take our tour.