Cisco router security bundles support the delivery of security features such as Cisco IOS Software-based intrusion prevention systems (IPS), firewall, URL filtering, VPN, and infrastructure security services over numerous WAN access technologies, offering the highest levels of performance, security, scalability, and availability for today's small to midsize businesses or enterprise branch offices. Cisco Catalyst 6500 Series security bundles are based on the Cisco Catalyst 6500 Series E chassis and the Firewall Services Module.