Support

Apparently you enabled the "Administrator query string parameter" without noticing. This is why accessing /administrator was triggering security exceptions and redirecting you to the frontpage of the site. You did that many times in a row and the automatic IP block you have set up in Admin Tools kicked in and kicked you out of your site.

Don't worry. It happens to everybody. It's even happened to me, several times.

Please follow the instructions in https://www.akeebabackup.com/documentation/troubleshooter/atwafissues.html to rename main.php as you already did.

Now log in to the back-end of your site.

Go to Components, Admin Tools. See the big, red "Unblock my IP" button above the icons for Admin Tools features? Click on it. This will prevent any more "You are a spammer, hacker or an otherwise bad person." messages for your IP address.

Now, let's fix the problem that locked you out of your site.

Go to Web Application Firewall, Configure WAF and click on the Basic Protection Features tab. The fourth line reads "Administrator secret URL parameter". Remove all contents of the text box next to it and click on Save & Close.

Now renamed main-d.php back to main.php