Cisco ASA 5520 Security Appliance

The Cisco ASA 5520 Security Appliance is a high-availability enterprise firewall and VPN. It is designed as a perimeter security device, as well as a VPN head point for all enterprise connectivity. The ASA 5520 supports a 2.0-GHz Celeron processor, with up to 512 MB of RAM and 64 MB of Flash memory.

The availability of security contexts allows the ASA 5520 to support more flexible firewall design than the ASA 5510. In addition, the ASA 5520 allows the use of SSL VPNs (WebVPN) to support up to 750 IPSec VPNs.

The ASA 5520 can be configured for LAN-based failover by default. Failover can be enabled as Active/Active or Active/Standby.

Connection capabilities for the ASA 5520 Security Appliance are as follows:

■ Maximum firewall throughput—450 Mbps

■ Maximum throughput (with AIP-SSM-10)—225 Mbps

■ Maximum throughput (with AIP-SSM-20)—375 Mbps

■ Maximum VPN throughput—225 Mbps

■ Maximum concurrent connections—130,000

■ Maximum concurrent IPSec VPN peers—300/750*

■ Maximum concurrent WebVPN peers—300/750*

NOTE * The larger number is only available with a Cisco ASA 5520 VPN Plus License.

Two licenses are available for the ASA 5520. The Base software license enables the standard functions of the ASA Security Appliance, 300 IPSec VPN peers, and 25 VLANs. With the ASA 5520, security contexts are enabled by default, and security contexts are installed with the Base License 2.

The Security Plus Software License supports all the Base Software License features. Security Plus upgrades the maximum VPN peers from 300 to 750. The ASA 5520 supports up to ten Security Contexts, with the purchase of the VPN Plus License. Table 3-8 describes the available licenses and their functions.

Table 3-8 Cisco ASA 5520 Licenses

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License	Function
Base Software License	Support for 4 10/100/1000 MB interfaces, 1 10/100 MB interface, 25 VLANs, 2 security contexts, and 300 IPSec VPN peers
VPN + Software License	Support for 4 10/100/1000 MB interfaces, 1 10/100 MB interface, 25 VLANs, 2 security contexts, and 750 IPSec VPN peers

Continue reading here: Cisco ASA 5540 Security Appliance

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