klipse wrote

  @thegoodguy 

 

Is your main Deco in Router mode or Access Point mode? DDNS is only available in router mode so if you are using your Deco in AP mode you wont have the DDNS option under Advanced tab on Deco app.

 

 

  @klipse 

Apologies for interrupting your conversation, but...

Notice OP says "happily worked before" and "P9 is now between devices and router." 

That tells me the following:

1. Router is/was configured properly for DDNS;

2. Router has not been replaced by Main Deco.

In situation like this, the easiest solution would be to switch Deco mesh to Access Point mode, so that Deco mesh and all devices connected to it will rely on Router for DNS (and DDNS).

Also note that if OP have had Deco running in AP mode already, with network layout he described he would not have had issues. Which makes me believe his Deco mesh runs in its default "Router" mode. 

  @thegoodguy 

Thank you both for the AP/Router wisdom. I just checked, and Alexandre. is right in saying that my P9 is in Router mode. I will try to make the change to AP mode, but it will be a little bit of a mission because I spent some time figuring out how to fix the local IP addresses of the cameras and DVR, in the P9 (and updating the DVR camera-IP settings). I'm guessing I'll have to change these back to the original settings before I switch to AP mode in case I lose access to them after the switch.

Thanks again :-)

  @thegoodguyHi,

Just thought I'd post a quick update.

I finally got around to reverting all the IP settings and switching the P9 to bridge mode. The remote CCTV access via DDNS is restored.

Thanks v much for the assistance.