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.

• Complete integrity check
  • uses cryptographic checksums of files to detect modifications,
  • can find rogue SUID executables anywhere on a 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

• Host-based intrusion detection system comparison

• Samhain Homepage