December 2005
Beginner
480 pages
13h 27m
English
Content preview from Linux Server Hacks, Volume TwoBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Hack #66. Tame Tripwire
The Tripwire program is a great intrusion-detection system, but it can also be a pain to configure. Save yourself time and trouble with these tips and tricks.
Do you ever wake up in a cold sweat at night, worrying about someone compromising your servers? Have you ever found yourself wondering if the ls binary that you execute on your machine is actually telling you the truth about the files in your home directory? If so, welcome to the wonderful world of system administrator paranoia. And here's a tip: you should look into the possibility of deploying an intrusion-detection system on your servers so that you can rest easy every night.
There are many different types of IDS out there. Some focus on analyzing incoming network connections, some simply monitor logs and send alerts to sleeping sysadmins, and others analyze the binaries, configuration files, and libraries on a system and notify sysadmins of any changes. Tripwire is an excellent example of the third type of IDS software. It creates a database of the characteristics of the files in your filesystem and can then monitor the integrity of every single file and directory on your server. But while such security can be massively reassuring to the paranoid sysadmin, it doesn't come without a cost. Tripwire can be a beast to set up and configure properly, and hours of tweaking may be required to tune it properly for your filesystem. However, with a little bit of help, you can have Tripwire running strong ...
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