The Cisco PIX 535 is a high-performance, purpose-built security appliance that delivers enterprise-class security for enterprise and service provider networks.

The Cisco PIX 535 modular three-rack-unit design supports up to ten 10/100 Fast Ethernet interfaces or nine Gigabit Ethernet interfaces and redundant power supplies, making it an ideal appliance for businesses that need the highest levels of performance, port density, reliability, and investment protection. It also delivers up to 1.7 Gbps of firewall throughput with the capability to handle more than 500,000 simultaneous sessions.

Certain PIX 535 models include high-availability services as well as integrated hardware VPN acceleration that delivers up to 440 Mbps of Triple Data Encryption Standard (3DES) VPN throughput and 440 Mbps of Advanced Encryption Standard-256 (AES) VPN throughput.