Lynis Security Controls

BANN-7122 - Banner in /etc/motd


Authorized and unauthorized users should know that the system is monitored and deter unauthorized users from attempting to log in.



How to solve

Define a banner text to inform both authorized and unauthorized users about the machine and service they are about to access. The purpose is to share your policy before an access attempt is being made. Users should know that there privacy might be invaded, due to monitoring of the system and its resources, to protect the integrity of the system. Also unauthorized users should be deterred from trying to access it in the first place. Do not reveal sensitive information, like the specific goal of the machine, or what can be found on it. Consult with your legal department, to determine appropriate text.

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Linux and Unix System Hardening

This information is provided as part of the Lynis community project. It is related to Lynis control BANN-7122. All information should be considered as-is, without guarantees. Any advice or snippets should be tested before implementing in production environments.


Lynis is a technical security audit tool for Unix flavors like Linux, macOS, AIX, Solaris, and *BSD. It is open source software and free to use. The project has an active community, including open development via GitHub.

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