More Passwords
The console password protects the router from console access.
When this password is set, someone attempting to access the router from the console connection will have to enter a password before he or she can enter any other commands.
The AUX password is requested whenever someone attempts to access the router via a modem from the AUX port.
The virtual terminal passwords are set to restrict users from telnetting into the router.
If you want to configure encryption for all of your router passwords, enter the command service password-encryption at the global configuration prompt.
You must be in line configuration mode to configure the console, aux, and virtual terminal passwords.