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WordPress 3 Ultimate Security by Olly Connelly

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Integrity, logs, and alerts with OSSEC

Founded by the El Cid of HIDS Daniel Cid, OSSEC monitors your system configuration, file integrity, and any logs you throw at it. Its active response blocks badness and, by way of a tidy aside, it routs rootkits. What's more, it reports back to us by e-mail or by parsing data to a GUI, so we can home in on problems with efficiency:

Obtaining and verifying the source

You may or may not need some compilation tool or other, like so:

aptitude install build-essential

Now head to the downloads page, http://ossec.net/main/downloads, right-clicking and noting the link location for the latest Unix/Linux version. Take root, change to a suitable download location and, swapping your version for this ...

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