Cisco ASA5520 Series Firewalls - Refurbished Used: NetworkTigers offers reliable, tested, seller refurbished and used firewall security devices. We can overnight these proven Adaptive Security Appliance Cisco ASA5520 Firewalls to your office. All the refurbished Cisco ASA5520 Firewall models we sell are pre-owned, power-on tested by qualified technicians, working, reset-to-factory default and in great condition.

The Cisco ASA 5520 Adaptive Security Appliance delivers security services with Active/Active high availability and Gigabit Ethernet connectivity for medium-sized enterprise networks in a modular, high-performance appliance.