STIGQter: STIG Summary: Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide Version: 1 Release: 7 Benchmark Date: 01 Jul 2026:

AlmaLinux OS 9 systems using Domain Name Servers (DNS) resolution must have at least two name servers configured.

DISA Rule

SV-269289r1050171_rule

Vulnerability Number

V-269289

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

ALMA-09-023670

Severity

CAT II

CCI(s)

CCI-000366 - Implement the security configuration settings.

Weight

Fix Recommendation

Configure the operating system 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" in the [main] section of /etc/NetworkManager/NetworkManager.conf, then 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", then add two DNS servers to a NetworkManager connection using the following commands:

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

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

$ grep nameserver /etc/resolv.conf

nameserver 192.168.2.4
nameserver 192.168.2.5

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

Vulnerability Number

V-269289

Documentable

False

Rule Version

ALMA-09-023670

Severity Override Guidance

Check Content Reference

Target Key

5664