Open CasaOS app store.
Install AdGuard Home.
Open settings of the installed AdGuard app.
Type the ports as follows
[! Warning] Troubleshoot
If you cannot set port 531 to 53, probably your OS uses the port 53. You can temporarily open the blocked port via Terminal → ref
sudo systemctl disable systemd-resolved
sudo systemctl stop systemd-resolved
Restart CasaOS.
It is imperative to verify the functionality of AdGuard. If no errors are present, updating the router’s DNS address to direct incoming internet traffic towards AdGuard is essential.
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Check the settings of AdGuard Home. It should look like the image below.
