The ESXi host Secure Shell (SSH) daemon must disable port forwarding.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-256434 | ESXI-70-000082 | SV-256434r959010_rule | Medium |
| Description |
| While enabling Transmission Control Protocol (TCP) tunnels is a valuable function of sshd, this feature is not appropriate for use on the ESXi hypervisor. |
| STIG | Date |
| VMware vSphere 7.0 ESXi Security Technical Implementation Guide | 2024-12-16 |
Details
| Check Text (C-60109r886081_chk) |
| From an ESXi shell, run the following command: # /usr/lib/vmware/openssh/bin/sshd -T|grep allowtcpforwarding Expected result: allowtcpforwarding no If the output does not match the expected result, this is a finding. |
| Fix Text (F-60052r886082_fix) |
| From an ESXi shell, add or correct the following line in "/etc/ssh/sshd_config": AllowTcpForwarding no |