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block url requests coming into our website

Posted on 2014-02-12
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Last Modified: 2014-02-16
i have an asa 5510 firewall.  inside i have our web server.  I continuously get intrusion attacks for a url that i do not host.  the domain is right but the last part of the url is a file i do not host.  symantec ids blocks it but i get so many that i would like to cut these requests off at the router.... how do i do this.  I know how to block website requests originating from the inside of the router to the outside.  can the asa also block url requests originating from the outside to the web server?  the ip addresses change so i cant block it by ip.
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Question by:jamesmetcalf74
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Giovanni Heward earned 2000 total points
ID: 39853458
Are you able to block by source IP or net range?

If not, I'd look into a layer 7 web application firewall (WAF), such as ModSecurity with the OWASP ModSecurity Core Rules as a starting point, or Sucuri WAF if you'd prefer a managed (cloud) solution.

You could also create your own IPS script, hosted at the offending URI.  Whenever the offending location is requested, the script would automatically update your ASA rules to block the source IP.
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