The Cisco Secure PIX Firewall series delivers strong security in an easy-to-install, integrated hardware/software appliance that offers outstanding performance. The series allows you to rigorously protect your internal network from the outside world - providing full firewall security protection. Unlike typical CPU-intensive full-time proxy servers that perform extensive processing on each data packet at the application level, Cisco Secure PIX firewalls use a non-UNIX, secure, real-time, embedded system.This is a FDDI Interface for the PIX Firewall.