What is the firewall and VPN throughput of the ASA 5520?

Cisco rates the ASA 5520 at 450 Mbps stateful firewall throughput and 225 Mbps 3DES/AES IPSec VPN throughput. It supports up to 280,000 concurrent connections and 9,000 new connections per second.

Is the ASA 5520 still supported by Cisco?

No. The ASA 5520 has reached End-of-Life and End-of-Support per Cisco's lifecycle bulletins. It is not eligible for current ASA 9.x software releases or vendor TAC support. It remains usable in lab and non-critical production roles.

What condition is this ASA 5520 and what does T.E.S IT-SOLUTIONS test?

This unit is refurbished. T.E.S IT-SOLUTIONS verifies boot diagnostics, all four Gigabit Ethernet ports, console access, and ASA software boot before shipment. See https://www.tes-itsolutions.com for our refurbished hardware program.

Cisco ASA 5520 Adaptive Security Appliance, 1U Firewall, 4-Port Gigabit Ethernet, 2GB RAM: This is a Cisco ASA 5500-series 1U rack-mount security appliance providing stateful firewall, VPN concentrator, and IPS-ready services for SMB and enterprise edge deployments. Model ASA 5520. This is a dedicated security appliance, not a router, switch, or general-purpose server. This is a refurbished unit, fully tested.

Engineering Context

The ASA 5520 is rated by Cisco at 450 Mbps stateful firewall throughput, 225 Mbps 3DES/AES VPN throughput, 9,000 connections per second, and up to 280,000 concurrent connections. It supports up to 750 IPSec VPN peers and 100 VLAN-tagged virtual interfaces. RAM is 2 GB and flash is 256 MB. The chassis is 1U rack-mount, dimensions 44.5 x 33.5 x 4.4 cm, weight approximately 9.1 kg. One expansion slot accepts an SSM (Security Services Module) for IPS or content security functionality.

Deployment & Use Cases

SMB and mid-size enterprise internet edge with stateful firewall and site-to-site IPSec VPN. Branch-office concentrator for remote-access SSL VPN (limited to 2 SSL VPN peers without additional licensing). Network segmentation between security zones using VLAN sub-interfaces. Lab and training environments for Cisco ASA configuration, ACL design, and VPN troubleshooting practice.

Technical Specifications

OEM: Cisco
Model: ASA 5520
Form Factor: 1U Rack-Mount
Firewall Throughput: 450 Mbps (stateful)
VPN Throughput: 225 Mbps (3DES/AES)
Concurrent Connections: 280,000
IPSec VPN Peers: Up to 750
VLANs: Up to 100
Interfaces: 4 x Gigabit Ethernet plus 1 x Management 10/100
Expansion: 1 SSM slot
RAM / Flash: 2 GB / 256 MB
Condition: Refurbished — Tested by T.E.S IT-SOLUTIONS

Compatibility & Hard Constraints

The ASA 5520 has reached End-of-Life and End-of-Support per Cisco; new TAC software updates are not available. Refurbished units are recommended for lab, non-production, or controlled production roles where vendor support is not required. Maximum supported software is Cisco ASA 8.4(x); not compatible with newer ASA 9.x feature sets that require successor platforms (ASA 5500-X series or Firepower). SSL VPN peers are limited to 2 by default; additional peers require AnyConnect or Premium licenses, sold separately. Power input is internal universal AC PSU; not a DC unit despite older spec sheets that list 48 V references.

Why Choose T.E.S IT-SOLUTIONS

T.E.S IT-SOLUTIONS tests every ASA 5520 for boot diagnostics, all four GbE interfaces, console access, and ASA software boot. We provide 1–3 day handling time, EU shipping, and post-sale technical support for ASA configuration questions.

Cisco ASA 5520 Adaptive Security Appliance 1U Firewall 4-Port GbE 2GB RAM

Name: Cisco ASA 5520 Adaptive Security Appliance 1U Firewall 4-Port GbE 2GB RAM
SKU: Cisco_ASA_5520_Refurbished

SKU: Cisco_ASA_5520_Refurbished

€200.00

Quantity