Dear Sir/Madam,
I own a D-link DIR-850L router (version B1 with firmware version of 2.23) of that DDNS service was provided by D-link. However D-link terminated the DDNS service since 01 July 2020. I then subscribed to dynu's DDNS service.

However the router does not have a built-in dynu service so that I have to switched to manual mode. But having set all the necessary parameters, there is still no connection status.

I upload a screen shot of the inputted parameters for your verification for your review!!

Thanks!!!