WP Defender Login Protection appears to offer an automatic ban option when users try to login with the username admin.
I have checked that box and have saved the settings. However, 24 hours later, no bans had occurred even though the log file shows that there were many attempts to login with the username admin.
I have tested the BAN link in the log file and am able to ban IP addresses that way. But the auto-ban function doesn't seem to be working.
Also, the auto-404-ban feature appears to be working correctly.
The support door is now open in case anybody wants to have a look.
I have NOT done a plugin conflict test because that would be extremely difficult to do in this case.