configuring SSH
 

I would like to know the best possible configuration for most secure sessions.

What all these options in the /etc/ssh/sshd_config mean?
Any good HOWTO configure SSH?

For starters, make sure you're allowing connections using ssh2 only.

You might also want to disable root logins.

Yep, i have disabled that.

But, i think that misconfiguration may lead to a system compromise.
Maybe there are some scanners that check for a misconfigured SSH server.