@sailboats hi, forgot to mention that my deco is behind another router (my isp modem) so it's still behind that firewall. But yeah thanks for pointing this out for everyone else whose deco is doing...

Hi guys, I just wanna share my config to workaround this issue. There is a setting in Deco app called Port Forwarding in Advance menu. I used this to forward port 53 to my Adguard server as DNS...