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Article ID : # Last review : 2008-08-19 19:32:00

How to detect unauthorised pages changes to websites


You can use Netmon to ensure no unauthorised changes are made to your web site pages. Netmon does this build building a checksum of your page content and then comparing this on subsequent visits to ensure the content has not changed. The usual alert can be triggered if changes are detected.

To setup a http content check, add a test from the netmon menu as normal. Make sure you select the test type 'HTTP' and add the full URL such as HTTP:// Make sure Port 80 (if that's what your HTTP server listens on) is selected. Once you've done that and filled in the rest of the options you can click the 'calculate crc' link which, after a second or 2 will put the calculated CRC in the correct field. If your browser does not support javascript then you will be taken to a web page where you can enter the URL and the CRC will be displayed to you.

That's all you need to do to ensure that you get alerted to content changes for that page.

You can also use the 'Check web page content for text' field to ensure that a piece of text is always on the page.

Bear in mind that if you have changing content such as a clock, times, changing news lines etc, then the CRC may well be different every time the page is visited, so you may not be able to use CRC checks on every page of your site.



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