resolved

If you try to run AdGuardHome on a system where the resolved daemon is started, docker will fail to bind on port 53, because resolved daemon is listening on 127.0.0.53:53. Here’s how you can disable DNSStubListener on your machine:

1. Deactivate DNSStubListener and update the DNS server address. Create a new file, /etc/systemd/resolved.conf.d/adguardhome.conf (creating the /etc/systemd/resolved.conf.d directory if needed) and add the following content to it:

   [Resolve]
   DNS=127.0.0.1
   DNSStubListener=no
   

   Specifying 127.0.0.1 as the DNS server address is necessary because otherwise the nameserver will be 127.0.0.53 which doesn’t work without DNSStubListener.

2. Activate a new resolv.conf file:

   mv /etc/resolv.conf /etc/resolv.conf.backup
   ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf
   

3. Stop DNSStubListener:

   systemctl reload-or-restart systemd-resolved