STIGQter: STIG Summary: VMware vSphere 7.0 vCenter Appliance Photon OS Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 30 Jan 2025:

The Photon operating system must configure sshd to disconnect idle Secure Shell (SSH) sessions.

DISA Rule

SV-256514r970703_rule

Vulnerability Number

V-256514

Group Title

SRG-OS-000163-GPOS-00072

Rule Version

PHTN-30-000038

Severity

CAT II

CCI(s)

CCI-001133 - Terminate the network connection associated with a communications session at the end of the session or after an organization-defined time period of inactivity.

Weight

Fix Recommendation

Navigate to and open:

/etc/ssh/sshd_config

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

ClientAliveCountMax 0

At the command line, run the following command:

# systemctl restart sshd.service

Check Contents

At the command line, run the following command:

# sshd -T|&grep -i ClientAliveCountMax

Expected result:

ClientAliveCountMax 0

If the output does not match the expected result, this is a finding.

Vulnerability Number

V-256514

Documentable

False

Rule Version

PHTN-30-000038

Severity Override Guidance

At the command line, run the following command:

# sshd -T|&grep -i ClientAliveCountMax

Expected result:

ClientAliveCountMax 0

If the output does not match the expected result, this is a finding.

Check Content Reference

Target Key

5520