Parental control and safe browsing options cause SERVFAIL in the responses and are not working

[Versty]

Prerequisites

• I have checked the Wiki and Discussions and found no answer

• I have searched other issues and found no duplicates

• I want to report a bug and not ask a question or ask for help

• I have set up AdGuard Home correctly and configured clients to use it. (Use the Discussions for help with installing and configuring clients.)

Platform (OS and CPU architecture)

Linux, AMD64 (aka x86_64)

Installation

GitHub releases or script from README

Setup

On one machine

AdGuard Home version

v0.107.37

Action

0. Install and configure AdGuard Home
1. Enable parental control option
2. Launch terminal and perform nslookup xxnx.com command

Expected result

The IP address of AdGuard's protection page is displayed in response
The adult website is marked as blocked by parental control in the query log.

Actual result

The SERVFAIL error is displayed in the response section.
The adult website is marked as blocked by parental control in the query log.

Additional information and/or screenshots

parental_block_host: "" and safebrowsing_block_host: "" fields are empty in the default AdGuardHome.yaml config file.

[ainar-g]

Working on a fix.

The workaround is to:

1. Stop AdGuard Home.

2. Edit the configuration file, AdGuardHome.yaml, to have:

   # …
   filtering:
     # …
     parental_block_host: 'family-block.dns.adguard.com'
     safebrowsing_block_host: 'standard-block.dns.adguard.com'
     # …

3. Start AdGuard Home.

[ainar-g]

Should be fixed on Edge, going to be released with v0.107.38.

[djparus]

Working on a fix.

The workaround is to:

1. Stop AdGuard Home.
2. Edit the configuration file, AdGuardHome.yaml, to have:

   # …
   filtering:
     # …
     parental_block_host: 'family-block.dns.adguard.com'
     safebrowsing_block_host: 'standard-block.dns.adguard.com'
     # …

3. Start AdGuard Home.

This does not work. AdGuard Home v.0.107.38 on Keenetic Ultra