Lynis Security Controls

NETW-3014 - Promiscuous interfaces


When a network interface is actively listening it is in "promiscuous mode". This may happen when running a tool like tcpdump, an IDS, or some other software component.



How to solve

Check the process list for clues which piece of software put the network interface in promiscuous mode.

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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 NETW-3014. 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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