The SSH daemon must set a timeout count on idle sessions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-208922	OL6-00-000231	SV-208922r793708_rule		Low

Description
This ensures a user login will be terminated as soon as the "ClientAliveCountMax" is reached.

STIG	Date
Oracle Linux 6 Security Technical Implementation Guide	2021-12-03

Details

Check Text ( C-9175r357746_chk )
To ensure the SSH idle timeout will occur when the "ClientAliveCountMax" is set, run the following command: # grep ClientAliveCountMax /etc/ssh/sshd_config If properly configured, output should be: ClientAliveCountMax 0 If it is not, this is a finding.

Fix Text (F-9175r357747_fix)
To ensure the SSH idle timeout occurs precisely when the "ClientAliveCountMax" is set, edit "/etc/ssh/sshd_config" as follows: ClientAliveCountMax 0