The ESXi host Secure Shell (SSH) daemon must set a timeout interval on idle sessions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-256395	ESXI-70-000027	SV-256395r885966_rule		Low

Description
Automatically logging out idle users guards against compromises via hijacked administrative sessions.

STIG	Date
VMware vSphere 7.0 ESXi Security Technical Implementation Guide	2023-06-21

Details

Check Text ( C-60070r885964_chk )
From an ESXi shell, run the following command: # /usr/lib/vmware/openssh/bin/sshd -T|grep clientaliveinterval Expected result: clientaliveinterval 200 If the output does not match the expected result, this is a finding.

Fix Text (F-60013r885965_fix)
From an ESXi shell, add or correct the following line in "/etc/ssh/sshd_config": ClientAliveInterval 200