Safer OpenSSH
From FBSD_tips
[edit] INCOMPLETE
If you use *nix most likely you have used OpenSSH a time or two. If you're a system admin you have grown to use it daily to perform tasks on remote machines. Below are a few more options you can use to futher secure ssh. I'll add more about ssh keys later, but for now here some basics. First are options for SSH itself then options for SSHD.
NOTE: Items here are from OpenSSH in base FreeBSD 7 system. I do not know if it is the same across various platforms like linux.
SSH
Config Location (FreeBSD): /etc/ssh/ssh_config
SSHD
Config Location (FreeBSD): /etc/ssh/sshd_config
