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Fail2banOSSEC
Free

The open-source software is available without a license fee. Hosting, hardware and…

 Free

Free and open source; the OSSEC+ edition is also free after registration.

Linux, Self-hosted, Command line Self-hosted
  • Cuts SSH and web brute-force noise dramatically with one jail enabled
  • Filters and actions are plain configuration files, easy to extend
  • Combines log analysis, file integrity monitoring and active response
  • Custom rules and scripts for tailored alerting
  • Regex-based log parsing breaks when a service changes its log format
  • Only reacts after failures are logged; it is not a preventive control
  • Configuration takes time to learn
  • Extra features such as machine learning need registration for OSSEC+
Self-hosted Self-hosted
Open source Open source
License: GPL-2.0 License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.