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

AlmaLinux OS 9 SSH daemon must not allow Generic Security Service Application Program Interface (GSSAPI) authentication.

DISA Rule

SV-269161r1050043_rule

Vulnerability Number

V-269161

Group Title

SRG-OS-000364-GPOS-00151

Rule Version

ALMA-09-009370

Severity

CAT II

CCI(s)

CCI-001813 - Enforce access restrictions using organization-defined mechanisms.

Weight

Fix Recommendation

Configure the SSH daemon to not allow GSSAPI authentication.

Add the following line to "/etc/ssh/sshd_config", or uncomment the line and set the value to "no":

GSSAPIAuthentication no

Alternatively, add the setting to an included file if the line "Include /etc/ssh/sshd_config.d/*.conf" is found at the top of the "/etc/ssh/sshd_config" file:

GSSAPIAuthentication no

Restart the SSH daemon for the settings to take effect:

$ systemctl restart sshd.service

Check Contents

Verify the SSH daemon does not allow GSSAPI authentication with the following command:

$ /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*gssapiauthentication'

gssapiauthentication no

If the value is returned as "yes", the returned line is commented out, no output is returned, and the use of GSSAPI authentication has not been documented with the information system security officer (ISSO), this is a finding.

If the required value is not set, this is a finding.

Vulnerability Number

V-269161

Documentable

False

Rule Version

ALMA-09-009370

Severity Override Guidance

Check Content Reference

Target Key

5664