The built-in DNS client must be disabled.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-235774	SRG-APP-000157	EDGE-00-000062	SV-235774r1015299_rule	2024-09-13	2

Description
This setting controls whether to use the built-in DNS client. This does not affect which DNS servers are used; it only controls the software stack that is used to communicate with them. For example, if the operating system is configured to use an enterprise DNS server, that same server would be used by the built-in DNS client. However, it is however possible that the built-in DNS client will address servers in different ways by using more modern DNS-related protocols such as DNS-over-TLS. If this policy is enabled, the built-in DNS client is used if it is available. If this policy is disabled, the client is never used.

Description

This setting controls whether to use the built-in DNS client. This does not affect which DNS servers are used; it only controls the software stack that is used to communicate with them. For example, if the operating system is configured to use an enterprise DNS server, that same server would be used by the built-in DNS client. However, it is however possible that the built-in DNS client will address servers in different ways by using more modern DNS-related protocols such as DNS-over-TLS. If this policy is enabled, the built-in DNS client is used if it is available. If this policy is disabled, the client is never used.

ℹ️ Check
The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Use built-in DNS client" must be set to "disabled". Use the Windows Registry Editor to navigate to the following key: HKLM\SOFTWARE\Policies\Microsoft\Edge If the value for "BuiltInDnsClientEnabled" is not set to "REG_DWORD = 0", this is a finding.

✔️ Fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Use built-in DNS client" to "disabled".