I'm trying to block requests from a certain bot. I've added a request filtering rule, but I know it is still hitting the site because it shows up in Google Analytics. Here is the filtering rule I added:

      <filteringRule name="Block GomezAgent" scanUrl="false" scanQueryString="false">
          <add requestHeader="User-Agent" />
          <add string="GomezAgent+3.0" />

This is an example of the user agent I'm trying to block.


In some ways it seems to work. If I use Chrome to spoof my user agent, I get a 404, as expected. But the bot traffic is still showing up in my analytics. What am I missing?


I assume you took the string:


from the IIS logs. In the logs space characters are represented as plus (+) characters.

The real User Agent string is:

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0; GomezAgent 3.0) Gecko/20100101 Firefox/13.0.1

so removing the + from your denyStrings section should fix it.

  • That did it. I can already see the requests have dropped out of the server logs. – alexp Oct 24 '13 at 16:43

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