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AdguardHome: Add switch from DNS-over-HTTPS to IPv4 #511

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Merged
Antiz96 merged 1 commit into from
Feb 28, 2026
Merged

AdguardHome: Add switch from DNS-over-HTTPS to IPv4 #511

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1 change: 1 addition & 0 deletions Services/AdguardHome.md
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Expand Up @@ -28,6 +28,7 @@ Once first setup is done, you can access the Web interface on this URL:

Configuration can be done via the WebUI or directly on the server by editing the `/var/lib/adguardhome/AdGuardHome.yaml` file (requires a restart of the service for changes to be applied).

- I had to switch the upstream DNS server from DNS-over-HTTPS (`https://dns10.quad9.net/dns-query`) to IPv4 (`9.9.9.9`), otherwise I was suffering from random DNS resolution failures due to failed queries / connection closing prematurely (I also added `1.1.1.1` as a secondary upstream DNS server).
- I had to set the `Rate limit` parameter to `0` (otherwise DNS requests were rate limited, most likely because of Zabbix).
- I had to disable the resolving of IPv6 addresses by checking the related parameter under the DNS settings in order to avoid unexpected NXDOMAIN responses (e.g. with `Homepage`).
- I had to disable `system-resolved` and switch back to a static entry in `/etc/resolv.conf` to avoid Adguard's service to fail due to conflicting binding between `systemd-resolved`'s stub listener and Adguard (which both want to bind port 53).