Changing minimum requirement to password
Password policies - Trusted and Non-Trusted
untrusted <-> trusted system
Enable/Disable non-root login
Setting the minimum password size
Prevent re-use a password
Allowing logins specified period
Disabling last login information
Ipfilter
Ipfilter - logging tcp/upd connections
Allow only direct root logins on the system console
Using the Restricted SMH Builder for Limited Superuser Access
Recovery root password (system non-trusted)
Adding timestamp after each command typed, using a trap
Restrict the access to the /etc/passwd file through ftp
