If this kind of security exception repeats itself, please log in to your site's back-end and add this IP address to your Admin Tools's Web Application Firewall feature in order to completely block the misbehaving user.
I have done this so often, I'm now getting a warning about too many entries in the site ip blacklist causing possible performance issues.
Is there a way to determine that the geographic blocking is working? If so, can I delete the entries in the site ip blacklist? What would you recommend.
Thanks in advance for your advice. I greatly appreciate your help.