another ssh question

I was looking and at playing around with /etc/ssh/sshd_conf.  What I want to do is
after say 5 or so failed attempts to ssh, I want it to block ssh at least for a time
(to keep people from hacking in).  I uncommented anything that looked like it
might do that, restarted sshd (even rebooted).  Then I tried to ssh several times
making up things for password: banana, orange, lemon, apple, etc. (the real password
is nothing like that).  I got through all the fruits and several vegetables and it still
wasn't denied.  When I finally entered the correct password it let me in right away.

What is the correct way to block ssh attempts after several failed ones?