Logging Failed Login attempts

[Ted Beaton]

I'm trying to log bad login attemps.  They are supposed to be logged to 
/var/log/btmp according to the man page on the "lastb" command.  I 
touched the /var/log/btmp file to create it and when I run the lastb 
command it reads the file but none of the "bad login attempts" get 
logged to the file.  Anyone know how to turn this logging on?  I have 
tested faillog and that works if someone uses a real username to try and 
login and fails but does not record failed login attempts with a bogus 
username (ie someone guessing usernames).  Any ideas?

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