STIGQter: STIG Summary: Red Hat Enterprise Linux 10 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Jul 2026:

RHEL 10 must configure a DNS processing mode in Network Manager to avoid conflicts with other Domain Name Server (DNS) managers and to not leak DNS queries to untrusted networks.

DISA Rule

SV-281362r1167236_rule

Vulnerability Number

V-281362

Group Title

SRG-OS-000420-GPOS-00186

Rule Version

RHEL-10-800300

Severity

CAT II

CCI(s)

• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.

Weight

10

Fix Recommendation

Configure RHEL 10 to use a DNS mode in Network Manager.

In "/etc/NetworkManager/NetworkManager.conf", add the following line in the "[main]" section:

dns = none

Where <dns processing mode> is default, none, or systemd-resolved.

Network Manager must be reloaded for the change to take effect:

$ sudo systemctl reload NetworkManager

Check Contents

Verify RHEL 10 has a DNS mode configured in Network Manager.

$ NetworkManager --print-config
[main]
dns=none

If the dns key under "main" does not exist or is set to "dnsmasq", this is a finding.

Note: If RHEL 10 is configured to use a DNS resolver other than Network Manager, the configuration must be documented and approved by the information system security officer.

Vulnerability Number

V-281362

Documentable

False

Rule Version

RHEL-10-800300

Severity Override Guidance

Verify RHEL 10 has a DNS mode configured in Network Manager.

$ NetworkManager --print-config
[main]
dns=none

If the dns key under "main" does not exist or is set to "dnsmasq", this is a finding.

Note: If RHEL 10 is configured to use a DNS resolver other than Network Manager, the configuration must be documented and approved by the information system security officer.

Check Content Reference

M

Target Key

5733