Suricata is an Intrusion Detection and Prevention (IDS/IPS) engine developed by the Open Information Security Foundation and its supporting vendors. The engine is multi-threaded and has native IPv6 support, file extraction capabilities, and many more features. It's capable of loading existing Snort rules and signatures, and supports many frontends through Barnyard2.
Hawk IDS/IPS is a lightweight log analyzer which was designed to be fast and efficient. It scans log files on the fly and bans IPs which make too many password failures. It adds iptables rules to reject the IP addresses. You can define the logfiles. Hawk provides a unique Web interface and flexibility, and supports sshd, dovecot, courier, pure-ftpd, proftpd, cPanel, and DirectAdmin.
StopHack is a simple to use and easy to install intrusion prevention system. It is fully adaptable and easily customized to your environment. It is built on top of proven bandwidth arbitration technology so the traffic passing through it won't be slowed down. Every packet is analyzed with regular expression-based behavior anomaly detection, and hackers are blocked immediately. It prevents reflected cross-site scripting, SQL injection, directory traversal, reflected URL redirects, login brute forcing, remote shell execution, and more.
redBorder IPS is a high performance intrusion prevention system based on Snort running on top of a clustered pf_ring with specific enhancements. A Web management interface is provided to control a large number of such devices, including snort and device configuration, rule management, SNMP monitoring, user roles, and multi-domain support.
ThreadFix is a software vulnerability aggregation and management system that reduces the time it takes to fix software vulnerabilities. It imports the results from dynamic, static, and manual testing to provide a centralized view of software security defects across development teams and applications. The system allows companies to correlate testing results and streamline software remediation efforts by simplifying feeds to software issue trackers. By auto-generating application firewall rules, this tool allows organizations to continue remediation work uninterrupted. ThreadFix empowers managers with vulnerability trending reports that show progress over time, giving them justification for their efforts.