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V-258883

CAT II (Medium)

The Photon operating system must configure Secure Shell (SSH) to restrict AllowTcpForwarding.

Rule ID

SV-258883r933710_rule

STIG

VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

Discussion

While enabling TCP tunnels is a valuable function of sshd, this feature is not appropriate for use on single purpose appliances.

Check Content

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

# sshd -T|&grep -i AllowTcpForwarding

Example result:

allowtcpforwarding no

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

Fix Text

Navigate to and open:

/etc/ssh/sshd_config

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

AllowTcpForwarding no

At the command line, run the following command:

# systemctl restart sshd.service