[afnog] Website Monitoring Tool

[Phil Regnauld]

Righa Shake (righa.shake) writes:
> Hi All,
> 
> Am looking for a tool which can assist in monitoring websites such that
> whenever there is a change an automatic email alert is sent.
> 
> So far I have managed to get the following site http://visualping.io/.
> 
> Any ways that can help achieve the objective will be appreciated.

	All other suggestions are valid to some extent, but visualping
	only deals with *visible* changes.

	Typically you'll see cloaking attacks (https://support.google.com/webmasters/answer/66355?hl=en),
	especially with PHP based sites, and those are on purpose non-visible
	changes.

	To detect this, since the content is dynamic, you'll have to
	do more than just a checksum.

	Nagios' check_http will tell you if it *finds* a given string
	on a page, but not if additional data is there.

	A mix of wget on the page, counting the number of lines of output,
	and measuring the difference from run to run, is one way of doing it.

	Using check_http and looking for signatures of known attacks is another
	way, but probably not the easiest to maintain


	Phil