The ASA/PIX Security Appliance is a multifunctional device that includes the following:
Stateful firewall services
Network intrusion prevention
Encryption services (VPN/IPSec)
Auditing and reporting functions
Application firewalling (protocol compliance enforcement)
These services make the Cisco ASA/PIX Security Appliance an excellent solution for defense-in-depth deployment in any network environment.
For simplicity within this book, you use the ASA/PIX Security Appliance local database to implement authentication. Because the local database is used, this type of username password verification is called local authentication.