Tiger is a versatile security tool that serves as both a security audit and intrusion detection system, making it an effective solution for identifying and mitigating cyber threats.
With its modular design that is easy to expand, Tiger has some interesting features that merit its resurrection. It can be used as an audit tool as well as a host intrusion detection system tool. Most free software intrusion detection tools currently focus on network IDS (with Snort), to the kernel (LIDS, or SNARE for Linux and Systrace for OpenBSD), file integrity checkers (aide, integrit samhain, tripwire...), and log checkers.
Tiger compliments these tools by providing a framework in which all of them can work together. Unlike log checkers, it is not focused on integrity analysis. Instead, it checks the system configuration and status. For a full description of checks implemented in Tiger, you can read the manpage. An excellent example of what Tiger can do is check_findelete, a module that can determine which network servers running on a system are using deleted files.
Free software Linux/*BSD distributions come with a myriad of security tools to do local security checks such as Debian's checksecurity, Mandrake's msec, OpenBSD's /etc/security, and SUSE's Seccheck. Even though they perform similar checks, they have suffered from fragmentation. Tiger is being developed to substitute them at some point in the future. For a list of system security checks that Tiger provides that others do not, you can read this (short) comparison.
Version 3.2.3: N/A