@dinoSnake 

Hi,

Have you checked if the System Log might give some clues as to why it's not working? (Advanced menu -> System Tools -> System Log)

Could you post the information from your router's System Log here?

The log looks like this on my AX50 router when the DDNS is working properly:

ID    Time                            Type                   Level         Log Content
1    2021-09-20 16:27:50    Dynamic DNS    INFO         [816] Dynamic dns noip registered ip: x.x.x.x
2    2021-09-20 16:27:50    Dynamic DNS    NOTICE    [816] Dynamic dns noip login succeed
3    2021-09-20 16:27:50    Dynamic DNS    INFO         [816] Dynamic dns noip return code nochg
4    2021-09-20 16:27:47    Dynamic DNS    INFO         [816] Dynamic dns noip login start

@woozle 

Thank you for the reply.

Yes, I checked the logs during the attempts.  The log doesn't even show a DDNS attempt, nor a failure, or *any* DDNS info at all for that matter.

I have rebooted several times and, as noted, upgraded to the most recent firmware.

@dinoSnake 

Can you try a manual DDNS update via a browser of a device that is connected to the C3200 and see if that works or not? Just to confirm that it isn't being blocked somehow.

The format is: https://username:password@dynupdate.no-ip.com/nic/update?hostname=abcde.xyz.com&myip=192.168.88.88

(Fill in the proper values for the blue text. For this test the IP can be any, just check afterwards that you see this IP in your no-ip account. You can use either https or http, both should work.)

@woozle No-IP properly identified and registered an IP when I created the new host name from a browser connected to the network in question.  I can access my systems using that No-IP-acquired IP address, but No-IP states they are not receiving any updates from the registered address (No-IP states they are not receiving updates from the router since the new host name was created).