1.crowdsecurity / crowdsec
Open-source IDS/IPS, WAF and bot detection for Linux, Windows, Docker and Kubernetes, with a crowdsourced blocklist of malicious IPs.
+107 stars
from 15,309 · score 4.68
Trending repositories
Ranked by Attention Score: stars gained over the last 7 complete days
10 repositories by Attention Score · Oct 27, 2026 – Nov 2, 2026 (UTC)
2.fail2ban / fail2ban
Daemon to ban hosts that cause multiple authentication errors
+57 stars
from 18,872 · score 4.06
3.osquery / osquery
SQL powered operating system instrumentation, monitoring, and analytics.
+37 stars
from 23,675 · score 3.64
4.stamparm / maltrail
Malicious traffic detection system
+10 stars
from 8,639 · score 2.40
5.aceberg / WatchYourLAN
Lightweight network IP scanner written in Go. With notifications, history, export to Grafana
+7 stars
from 7,647 · score 2.08
6.ossec / ossec-hids
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.
+4 stars
from 5,066 · score 1.61
7.Security-Onion-Solutions / security-onionArchived
Security Onion 16.04 - Linux distro for threat hunting, enterprise security monitoring, and log management
+2 stars
from 3,134 · score 1.10
8.cossacklabs / acra
Database security suite. Database proxy with field-level encryption, search through encrypted data, SQL injections prevention, intrusion detection, honeypots. Supports client-side and proxy-side ("transparent") encryption. SQL, NoSQL.
+1 stars
from 1,494 · score 0.69
9.activecm / rita
Real Intelligence Threat Analytics (RITA) is a framework for detecting command and control communication through network traffic analysis.
+1 stars
from 666 · score 0.69
10.hookprobe / hookprobe
🛡️ Free AI that blocks hackers while you sleep. Runs on cheap hardware. When someone in Tokyo gets attacked, you're protected in 30 seconds. No fees. No experts needed. Just protection. One node's detection → everyone's protection.
+1 stars
from 47 · score 0.69