The SSH daemon must be configured to use only the SSHv2 protocol.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
RHEL-06-000226	RHEL-06-000226	RHEL-06-000226_rule		High

Description
SSH protocol version 1 suffers from design flaws that result in security vulnerabilities and should not be used.

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

Details

Check Text ( C-RHEL-06-000226_chk )
To check which SSH protocol version is allowed, run the following command: # grep Protocol /etc/ssh/sshd_config If configured properly, output should be Protocol 2 If it is not, this is a finding.

Fix Text (F-RHEL-06-000226_fix)
Only SSH protocol version 2 connections should be permitted. The default setting in "/etc/ssh/sshd_config" is correct, and can be verified by ensuring that the following line appears: Protocol 2