Rootkit Hunter
Open-source GPL rootkit scanner for Unix-like systems. Scans for rootkits, trojans, backdoors and local exploits. Tests include scanning of plaintext and binary files for MD5 hash comparisons, default rootkit files, binary permissions, suspect LKM/KLD module strings, and hidden files.
Shadow Intrusion and Network Analysis
Shadow is an intrusion-detection system from the Naval Surface Warfare Center, shows promise in detecting previously unknown attacks for which no known detection signatures exist.
sLink project
sLink consists of a daemon and a suite of cgi programs which provide a web administration interface to an EDM/BOSCH Solution16 Alarm Panel.
Snortalog
Perl-based log analysis tool that summarizes network security events from any native snort database format.
Systrace (Interactive Policy Generation for System Calls)
Systrace enforces system call policies for applications by interactively constraining the application's access to the system (*bsd and linux). Systrace is able to monitor daemons on remote machines and generate warnings at a central location.
Virtual eXecuting Environment
VXE is an open source Intrusion Prevention System intended to protect Unix subsystems (daemon protection) from known and unknown network intrusion threats.
Snort
A free lightweight network intrusion detection system for UNIX and Windows.
ACID (Analysis Console for Intrusion Databases)
Powerful PHP-based data analysis tool for network security events captured by many common IDS tools, including snort and tcpdump.
Advanced Intrusion Detection Environment
AIDE is a file integrity checker that supports regular expressions. Licensed with GPL.
The Bleeding Edge of Snort
Bleeding Snort was a response to the need for a centralized spot for Snort Signatures to be aggregated and maintained. Contains snort rules for malware, viruses, and "0day" exploits.
Chkrootkit
Provides open source application to check for presence of rootkits installed on Linux/Unix machines. Links to security related sites.
Fail2Ban
fail2ban is a POSIX/Linux tool used to ban IP addresses that generate too many password failures. ssh, iptables, ipfwadm and ipfw are currently supported.
Fairly Fast Packet Filter
The Fairly Fast Packet Filter (FFPF) is a network monitoring framework for Linux. FFPF achieves high throughput by pushing computationally intensive tasks to the kernel or even network processors and by minimising packet copying.
Firestorm Network Intrusion Detection System
Firestorm is a high-performance GPL-licensed network intrusion detection system (NIDS). Features include being fully pluggable, easily configurable, and an extremely scalable signature engine.
Honeyd
Small daemon that creates virtual hosts on a network (honeypot). Can be used as a virtual honeynet or for network monitoring. For *BSD, GNU/Linux, and Solaris.
IDABench
IDABench is a pluggable framework for intrusion analysis built upon the Naval Surface Warfare Center, Dahlgren Division's SHADOW versions 1.7 and 1.8. Scripts can be extended via plugins that pass packet data to (and output from) most libpcap-based tools.
Idsa
Experimental intrusion detection system and reference monitor designed to run at application level. For Linux. GPL/LGPL.
LAk Intrusion Prevention System
A single compilation of source, binaries, scripts and whitepapers on intrusion prevention systems. The aim is to quickly establish a working IPS within minutes.
LIDS Project - Secure Linux System
LIDS is an enhancement for the Linux kernel written by Xie Huagang and Philippe Biondi. It implements several security features that are not in the Linux kernel natively. Some of these include: mandatory access controls (MAC), a port scan detector, file protection (even from root), and process protection.
myNetWatchman.com
Intrusion Reporting and Response. Users forward firewall logs that are aggregated and analysed to identify incidents that are reported to the responsible party.
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