The Cisco PIX 506E Firewall is a purpose-built security appliance that provides rich security services including stateful inspection firewalling, virtual private networking (VPN) and intrusion protection in a single device. Using the Cisco state-of-the-art Adaptive Security Algorithm (ASA) and PIX operating system, the PIX 506E ensures that all the users behind it are safe and secure from threats lurking on the Internet. Its powerful stateful inspection firewall technology keeps track of the state of authorized users' network requests and prevents unauthorized network access.