Table of Contents

5.2.15 Ensure SSH warning banner is configured (Scored)

Profile Applicability

Level 1 - Server
Level 1 - Workstation 

Description

The Banner parameter specifies a file whose contents must be sent to the remote user before authentication is permitted. By default, no banner is displayed.

Rationale

Banners are used to warn connecting users of the particular site's policy regarding connection. Presenting a warning message prior to the normal user login may assist the prosecution of trespassers on the computer system.

Audit

Run the following command and verify that output matches:

# grep "^Banner" /etc/ssh/sshd_config 
Banner /etc/issue.net

Remediation

Edit the /etc/ssh/sshd_config file to set the parameter as follows:

Banner /etc/issue.net