samhain: samhain (host-based intrusion detection system) samhain: samhain: The Samhain open source host-based intrusion detection system (HIDS) samhain: provides file integrity checking and logfile monitoring/analysis, as samhain: well as rootkit detection, port monitoring, detection of rogue SUID samhain: executables, and hidden processes. It has been designed to monitor samhain: multiple hosts with potentially different operating systems, providing samhain: centralized logging and maintenance, although it can also be used as samhain: a standalone application on a single host. samhain: samhain: Homepage: http://www.la-samhna.de/