Renamed login page exposed

Hello!

For more than a month now I’m observing a abnormal number of attempts to login in all of my four websites, all of them trough /wp-login.php. Today I tried in a normal browsing window and in a private browsing window to access the websites with their name and /wp-login.php and discovered that in all of them it redirects to the renamed login URL instead of a 404 Not Found page. Double problem: a huge amount of attempts to login e my renamed pages are exposed, so I will have to change all of them. What is happening please?

Can you solve it?

best regards

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