The ESXi host Secure Shell (SSH) daemon must set a timeout count on idle sessions.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-256394 | ESXI-70-000026 | SV-256394r959010_rule | CCI-000366 | low |
| Description | ||||
| Setting a timeout ensures that a user login will be terminated as soon as the "ClientAliveCountMax" is reached. | ||||
| STIG | Date | |||
| VMware vSphere 7.0 ESXi Security Technical Implementation Guide | 2025-02-11 | |||
Details
Check Text (C-256394r959010_chk)
From an ESXi shell, run the following command:
# /usr/lib/vmware/openssh/bin/sshd -T|grep clientalivecountmax
Expected result:
clientalivecountmax 3
If the output does not match the expected result, this is a finding.
Fix Text (F-60012r885962_fix)
From an ESXi shell, add or correct the following line in "/etc/ssh/sshd_config":
ClientAliveCountMax 3