cyberstrikeus 9.3.14 Set SSH Banner (Scored)
Profile Applicability
- Level 1
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. Consult with your legal department for the appropriate warning banner for your site.
Audit Procedure
Using Command Line
To verify the correct SSH setting, run the following command and verify that <bannerfile> is either /etc/issue or /etc/issue.net:
grep "^Banner" /etc/ssh/sshd_config
Expected Result
Banner /etc/issue.net
Remediation
Using Command Line
Edit the /etc/ssh/sshd_config file to set the parameter as follows:
Banner /etc/issue.net
Default Value
No banner is configured by default.
References
- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
Profile
Level 1 - Scored