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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63191	ESXI-06-000011	SV-77681r1_rule		High

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

STIG	Date
VMware vSphere ESXi 6.0 Security Technical Implementation Guide	2019-01-04

Details

Check Text ( C-63925r1_chk )
To verify which SSH protocol version is configured, run the following command: # grep -i "^Protocol" /etc/ssh/sshd_config If there is no output or the output is not exactly "Protocol 2", this is a finding.

Fix Text (F-69109r1_fix)
Only SSH protocol version 2 connections should be permitted. Add or correct the following line in "/etc/ssh/sshd_config": Protocol 2