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

RHEL 10 must have at least two name servers configured for systems using Domain Name Server (DNS) resolution.

DISA Rule

SV-281338r1167164_rule

Vulnerability Number

V-281338

Group Title

SRG-OS-000420-GPOS-00186

Rule Version

RHEL-10-800060

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 two or more name servers for DNS resolution based on the DNS mode of the system.

If the NetworkManager DNS mode is set to "none", add the following lines to "/etc/resolv.conf":

nameserver [name server 1]
nameserver [name server 2]

Replace [name server 1] and [name server 2] with the IPs of two different DNS resolvers.

If the NetworkManager DNS mode is set to "default", add two DNS servers to a NetworkManager connection using the following command:

$ nmcli connection modify [connection name] ipv4.dns [name server 1],[name server 2]

Replace [name server 1] and [name server 2] with the IPs of two different DNS resolvers.

Replace [connection name] with a valid NetworkManager connection name on the system.

Replace ipv4 with ipv6 if IPv6 DNS servers are used.

Check Contents

Note: If the system is running in a cloud platform and the cloud provider gives a single, highly available IP address for DNS configuration, this control is not applicable.

Verify RHEL 10 has at least two name servers configured for systems using DNS resolution.

Verify the name servers used by the system with the following command:

$ sudo grep nameserver /etc/resolv.conf
nameserver 192.168.1.2
nameserver 192.168.1.3

If fewer than two lines are returned that are not commented out, this is a finding.

Vulnerability Number

V-281338

Documentable

False

Rule Version

RHEL-10-800060

Severity Override Guidance

Note: If the system is running in a cloud platform and the cloud provider gives a single, highly available IP address for DNS configuration, this control is not applicable.

Verify RHEL 10 has at least two name servers configured for systems using DNS resolution.

Verify the name servers used by the system with the following command:

$ sudo grep nameserver /etc/resolv.conf
nameserver 192.168.1.2
nameserver 192.168.1.3

If fewer than two lines are returned that are not commented out, this is a finding.

Check Content Reference

M

Target Key

5733