@Subhome4 

Hi,
If you mean you can access the home assistant connected to the Deco network when you are in the remote network via DDNS or Deco's WAN IP, but can't access it when you are in the local network, please check if the following tips help.
  1. Ensuring your Deco firmware is up to date.
  2. Rebooting your main Deco unit to see if that resolves the reported phenomenon.
  3. You can access the home assistant via its IP address  (e.g., 192.168.68.x:port) instead of the WAN IP when you're on the local network.

Best Regards