# ossec-hids

> Host-based intrusion detection and integrity monitoring

OSSEC is an open-source host-based intrusion detection system that integrates log monitoring, file integrity verification, rootkit detection, and real-time active response. It monitors systems to identify unauthorized activity, brute-force attacks, and configuration changes. It runs as a background service and command-line utility across servers and agent endpoints.

- Source: https://github.com/ossec/ossec-hids
- Homepage: http://www.ossec.net
- License: GPL-2.0
- Built with: C 87.8%, Shell 6.6%, Makefile 2.6%, Perl 2.0%, Other 1.0%
- Stars: 5069
- Forks: 1075
- Contributors: 133
- Last commit: 2026-10-31
- Latest release: 4.4.1 (2026-10-18)
- Purpose: Security & identity
- Type: CLI
- For: Personal, Enterprise

## Worth score: 76/100

How much DigGitHub recommends it, from activity, adoption, docs, license and security signals.

- Popularity: 19/25
- Momentum: 10/20
- Maintenance: 25/25
- Community: 11/15
- Readiness: 11/15

## Downloads

Latest release: [4.4.1](https://github.com/ossec/ossec-hids/releases/tag/4.4.1). Files from the project's GitHub release, not checked by DigGitHub.

Source code only: this release has no files to download.

To check the files: [ossec-hids-4.4.1.zip.asc](https://github.com/ossec/ossec-hids/releases/download/4.4.1/ossec-hids-4.4.1.zip.asc), [ossec-hids-4.4.1.tar.gz.asc](https://github.com/ossec/ossec-hids/releases/download/4.4.1/ossec-hids-4.4.1.tar.gz.asc)

## In collections

- [Protect your server and your code](https://diggithub.com/collections/protect-your-server)

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Source page: https://diggithub.com/ossec/ossec-hids
Updated: 2026-10-31