I attempted to login to my Wordpress administrator panel today, but there was a new login screen that I've never seen before, see screenshot below.The specific message you will see is "The server http://yourwebsite:80 requires a username and password. The server says: WordPress attack protection CAPTCHA. Enter username: xxxx Password: The result of math xxxxx.The login now requires you to input a predefined username of xxxx and an addition password of xxxx. What I thought was really weird was, I tried to login to another one of my Wordpress sites, and it prompted me with the same login screen, and showed the same username and password. Is this a legitimate Wordpress CAPTCHA, or is it the hackers trying to get access to our site? I really do not know. I'm writing this post because I didn't see anything else on the web talking about this yet, so I'm hoping someone else has seen this as well that's knowledgeable and can shed some light. I'm afraid if I enter the credentials, maybe my site will be compromised. Therefore I did not yet login.Update 9AMSpoke with my web host, and they said that they employed this security feature to block the botnets from accessing my website.