Table 3. Cisco ASA 5520 Adaptive Security Appliance Platform Capabilities and Capacities
Feature
Description
Firewall throughput
Up to 450 Mbps
Concurrent threat mitigation throughput (firewall + IPS services)
VPN throughput
Up to 225 Mbps
Concurrent sessions
280,000
IPsec VPN peers
750
SSL VPN peer license levels*
10, 25, 50, 100, 250, 500, or 750
Security contexts
Up to 20*
Interfaces
4 Gigabit Ethernet ports and 1 Fast Ethernet port
Virtual interfaces (VLANs)
150
Scalability
VPN clustering and load balancing
High availability
Active/Active, Active/Standby
*Separately licensed feature; includes two with base system