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Advanced settings

The Advanced settings section is intended for the more experienced user and includes the following settings.

Respond to blocked domains

Here you can select the DNS response for the blocked request:

  • Default: Respond with zero IP address (0.0.0.0 for A; :: for AAAA) when blocked by Adblock-style rule; respond with the IP address specified in the rule when blocked by /etc/hosts-style rule
  • REFUSED: Respond with REFUSED code
  • NXDOMAIN: Respond with NXDOMAIN code
  • Custom IP: Respond with a manually set IP address

TTL (Time-To-Live)

Time-to-live (TTL) sets the time period (in seconds) for a client device to cache the response to a DNS request and retrieve it from its cache without re-requesting the DNS server. If the TTL value is high, recently unblocked requests may still look blocked for a while. If TTL is 0, the device does not cache responses.

Block access to iCloud Private Relay

Devices that use iCloud Private Relay may ignore their DNS settings, so AdGuard DNS cannot protect them.

Block Firefox canary domain

Prevents Firefox from switching to the DoH resolver from its settings when AdGuard DNS is configured system-wide.

Log IP addresses

By default, AdGuard DNS doesn’t log IP addresses of incoming DNS requests. If you enable this setting, IP addresses will be logged and displayed in Query log.