It is because I have had to password-protect the WordPress Login Page in order to defeat what are now daily DOS and brute force attacks.
If you get an unfamiliar login page in which your normal username and password don’t work, email me and I will send you the information you need to log in.
Email me at email@example.com
Sorry for the inconvenience. This is the only solution I’ve yet found that actually defeats the DOS attacks. So it seems to be either this, or seeing the site go dark two or three hours a day.