Intrusion detection with Tripwire

Wednesday, 15 September 2004, 10:05 AM EST

The idea behind Tripwire is quite simple: it first creates a "baseline" database of the state of the files and directories on your system and then on subsequent runs it compares the current state of the files and directories against this baseline identifying any deletions, additions or changes. The files and directories to be checked are decided by a "policy" file. This file also defines what attributes to compare; this can include access, inode and modification timestamps, owner and group IDs, permissions, file size and type, MD5 and SHA hash values, etc.

In this article I will guide you through the process of getting and installing Tripwire, configuring it and setting it up to run on a daily basis. In the final section I will mention a few additional steps you can take to ensure the integrity of your Tripwire database and thus your file system.

By Barry O'Donovan at the Linux Gazette.

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