The Photon operating system must configure Secure Shell (SSH) to restrict AllowTcpForwarding.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-258883 | PHTN-40-000220 | SV-258883r991589_rule | Medium |
| Description |
| While enabling TCP tunnels is a valuable function of sshd, this feature is not appropriate for use on single purpose appliances. |
| STIG | Date |
| VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide | 2024-07-11 |
Details
| Check Text (C-62623r933708_chk) |
| 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 (F-62532r933709_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 |