I'm using an extension that allows only certain IP addresses to access my Magento admin. If someone tries to access my admin I get a message with the IP address.
Now I get messages that search engines crawlers try to access the URL of my admin page. First, they don't need to index those pages and second, I don't need to get a message every time a crawler tries to access these pages.
I know I can block access in my robot.txt, but then the URL of my admin page is public, while I just changed it to make it different from the default URL.
Is there another good way to block access to the admin URL completely?