Samhain (software)

Samhain is an integrity checker and host intrusion detection system that can be used on single hosts as well as large, UNIX-based networks. It supports central monitoring as well as powerful (and new) stealth features to run undetected in memory, using steganography.

Main features

Complete integrity check
- uses cryptographic checksums of files to detect modifications,
- can find rogue SUID executables anywhere on disk, and
Centralized monitoring
- native support for logging to a central server via encrypted and authenticated connections
Tamper resistance
- database and configuration files can be signed
- log file entries and e-mail reports are signed
- support for stealth operation

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