how to alert if web http crawls are taking place

["Jason Truong" <Jason.Truong () plumtree com>]

Just wondering if anyone in the Snort community have a rule in place that alerts them when a web (http) crawl takes 
place.

I'm interested in being alerted when a engineer decides to write his own application (or downloads one) that basically 
points to a website and starts to crawl/download all the content by following all the links within the code.  

I think this has happened before in my environment but since its http, it usually looks like normal traffic to snort.

Thanks,

Jason T.


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