ossec/ossec-hids
ossec/ossec-hids has 5,070 GitHub stars and 1,074 forks. GitHot measured 0 stars in 24 hours and +3 in 7 days. Last checked 2026-11-06 06:14 UTC. Last push 2026-10-31.
OSSEC is an Open Source Host-based Intrusion Detection System that performs log analysis, file integrity checking, policy monitoring, rootkit detection, real-time alerting and active response.
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README.md
OriginalOSSEC v4.4.0
Information about OSSEC
OSSEC is a full platform to monitor and control your systems. It mixes together all the aspects of HIDS (host-based intrusion detection), log monitoring and SIM/SIEM together in a simple, powerful and open source solution.
Visit our website for the latest information. www.ossec.net
Current Releases
The current stable releases are available on the ossec website.
Development
The development version is hosted on GitHub and just a simple git clone away.
Screenshots
File Integrity Monitoring

Attack Detection

Help / Support
Join us on slack, ossec.slack.com: Invites to [email protected]
Join us on Discord: https://discord.gg/BXzM75Xzq7
Credits and Thanks
- OSSEC comes with a modified version of zlib and a small part of openssl (sha1 and blowfish libraries)
- This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http://www.openssl.org/)
- This product includes cryptographic software written by Eric Young ([email protected])
- This product include software developed by the zlib project (Jean-loup Gailly and Mark Adler)
- This product include software developed by the cJSON project (Dave Gamble)
- Atomicorp hosting the annual OSSEC conference. Presentations for the 2019 conference can be found at https://www.atomicorp.com/ossec-con2019/
License
OSSEC is licensed under the GNU General Public License version 2 (GPLv2).
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