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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
RHEL-06-000231	RHEL-06-000231	RHEL-06-000231_rule		Low

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

STIG	Date
Red Hat Enterprise Linux 6 Security Technical Implementation Guide	2013-02-05

Details

Check Text ( C-RHEL-06-000231_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-RHEL-06-000231_fix)
To ensure the SSH idle timeout occurs precisely when the "ClientAliveCountMax" is set, edit "/etc/ssh/sshd_config" as follows: ClientAliveCountMax 0