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 send Transmission Control Protocol (TCP) timestamps.

DISA Rule

SV-256576r991589_rule

Vulnerability Number

V-256576

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

PHTN-30-000107

Severity

CAT II

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

At the command line, run the following commands:

# sed -i -e "/^net.ipv4.tcp_timestamps/d" /etc/sysctl.conf
# echo net.ipv4.tcp_timestamps=1>>/etc/sysctl.conf
# /sbin/sysctl --load

Check Contents

At the command line, run the following command:

# /sbin/sysctl -a --pattern "net.ipv4.tcp_timestamps$"

Expected result:

net.ipv4.tcp_timestamps = 1

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

Vulnerability Number

V-256576

Documentable

False

Rule Version

PHTN-30-000107

Severity Override Guidance

At the command line, run the following command:

# /sbin/sysctl -a --pattern "net.ipv4.tcp_timestamps$"

Expected result:

net.ipv4.tcp_timestamps = 1

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

Check Content Reference

M

Target Key

5520