Last weekend I received a notification from one of our web properties that it had experienced over 5000 errors in the past hour. I looked at the error log and noticed that the site was being hammered by a single IP address. I wanted to block the IP address until I could understand what was happening.
There is s security setting that can be set in the web.config as shown below:
<security> <ipSecurity allowUnlisted="true"> <clear /> <add ipAddress="184.108.40.206" allowed="false" /> </ipSecurity> </security>