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The Photon operating system must configure sshd to restrict AllowTcpForwarding.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-256587 | PHTN-30-000119 | SV-256587r887435_rule | Medium |
| Description |
|---|
| While enabling Transmission Control Protocol (TCP) tunnels is a valuable function of sshd, this feature is not appropriate for use on single-purpose appliances. |
| STIG | Date |
|---|---|
| VMware vSphere 7.0 vCenter Appliance Photon OS Security Technical Implementation Guide | 2023-02-21 |
Details
| Check Text ( C-60262r887433_chk ) |
|---|
| At the command line, run the following command: # sshd -T|&grep -i AllowTcpForwarding Expected result: allowtcpforwarding no If the output does not match the expected result, this is a finding. |
| Fix Text (F-60205r887434_fix) |
|---|
| 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 |