Go to the client's server, check the logs for their web server, and check to
see which IP was grabbing many pages very quickly. That will give you a clue.


Since I'm not a web server guy I cannot help you more than that. But surely
there is some type of HTTP log. To get a page, a browser sends a HTTP request
to the client server (your client), and the client server might track each
page that was requested. But the default settings for the client's web
software might be to keep only the last 10 or 30 days of that HTTP log, so act
quickly.