[CentOS] ssh attack

> Right now I use passwords for some ssh connections, and passwordless ssh 
> for crontab rsyncs, using passwordless rsa keys. (When it asked to enter 
> a password for ssh-keygen I just hit enter). Does this leave me 
> vulnerable? Is there a how-to on this that explains how to use ssh-agent 
> with keys with passes?

I recommend Keychain <http://www.gentoo.org/proj/en/keychain/>.  With
keychain, you can log in and unlock your keys and allow your ssh
communications to use them as needed.  You do have to unlock them after
each reboot.

Barry