Open Source Tripwire

What Open Source Tripwire is

Open Source Tripwire monitors files and directories and reports when the filesystem differs from a known baseline. Its policy file lets users choose what to monitor and which attributes to check, including hashes, permissions, and ownership. It runs on the user's system rather than as a managed service, with setup, configuration, baseline creation, and checks performed there. Policy, configuration, and database files are signed by default; reports may also be signed. Checks can send email reports when email reporting is enabled. The project suggests scheduling checks periodically with cron, but its install script does not create cron jobs. It supports POSIX-like systems including Linux, macOS, BSD variants, Solaris, AIX, HP-UX, Minix, Haiku, and GNU/Hurd. Windows users can build it under Cygwin, but this does not support Registry monitoring or Windows-specific file attributes. The software is free under GNU GPL version 2 or any later version. Tripwire also offers separate commercial supported products, including Tripwire for Servers and Tripwire Enterprise.