cyberstrikeus 5.1.18 Ensure SSH warning banner is configured (Automated)
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 Procedure
Run the following command and verify that output matches:
# sshd -T | grep banner
Banner /etc/issue.net
Expected Result
Output should show Banner /etc/issue.net.
Remediation
Edit the /etc/ssh/sshd_config file to set the parameter as follows:
Banner /etc/issue.net
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v7 | 5.1 Establish Secure Configurations | x | x | x |
Profile
- Level 2 - Server