STIGQter STIGQter: STIG Summary: VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 01 Jul 2026:

The Photon operating system must configure Secure Shell (SSH) to disable X11 forwarding.

DISA Rule

SV-258875r991589_rule

Vulnerability Number

V-258875

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

PHTN-40-000212

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Navigate to and open:

/etc/ssh/sshd_config

Ensure the "X11Forwarding" line is uncommented and set to the following:

X11Forwarding no

At the command line, run the following command:

# systemctl restart sshd.service

Check Contents

At the command line, run the following command to verify the running configuration of sshd:

# sshd -T|&grep -i X11Forwarding

Example result:

x11forwarding no

If "X11Forwarding" is not set to "no", this is a finding.

Vulnerability Number

V-258875

Documentable

False

Rule Version

PHTN-40-000212

Severity Override Guidance

At the command line, run the following command to verify the running configuration of sshd:

# sshd -T|&grep -i X11Forwarding

Example result:

x11forwarding no

If "X11Forwarding" is not set to "no", this is a finding.

Check Content Reference

M

Target Key

5569