ossec
ossec-hids
C

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.

Last updated Jul 9, 2026
5.0k
Stars
1.1k
Forks
232
Issues
0
Stars/day
Attention Score
99
Language breakdown
C 87.4%
Shell 7.2%
Perl 2.5%
Makefile 1.8%
NSIS 0.6%
Python 0.2%
โ–ธ Files click to expand
README

OSSEC v4.1.0

GitHub release (latest by date) GitHub license GitHub language count GitHub issues

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.

  • Releases can be downloaded from: Downloads
  • Release documentation is available at: docs

Development ##

The development version is hosted on GitHub and just a simple git clone away.

Build Status CodeQL

Screenshots ##

File Integrity Monitoring

FIM

Attack Detection

SSH Brute Force

Help / Support ##

Join us on slack, ossec.slack.com: Invites to slack@ossec.net

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 (eay@cryptsoft.com)
  • 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).

๐Ÿ”— More in this category

ยฉ 2026 GitRepoTrend ยท ossec/ossec-hids ยท Updated daily from GitHub