cyberstrikeus CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 - Control 4.2.4
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 Procedure
Command Line
Run the following command and verify that output matches:
sshd -T | grep -i banner
Expected Result
banner /etc/issue.net
Remediation
Command Line
Edit the /etc/ssh/sshd_config file to set the parameter as follows:
Banner /etc/issue.net
Default Value
Banner none
References
- NIST SP 800-53 Rev. 5: AC-8
CIS Controls
None
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Assessment Status
Automated