[CentOS] server is always getting hacked

Wed Jul 1 05:22:31 UTC 2009
Barry Brimer <lists at brimer.org>

>> I don't know if you can disable su -
> Sure: usermod -L root.  Before you do that, you need to have a user in
> /etc/sudoers that has root equivalence.  Ubuntu does this by default.

I believe putting 'root' into /etc/pam.d/su will make it so that no one 
can su to root.