Cisco ASA 5520 Firewalls - ASA 5520 Security Platform
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Network Liquidators is the premier online destination to sell and buy Cisco ASA 5520 firewalls. We keep an extensive inventory of used and new Cisco ASA 5520 firewalls in stock at most times which are usually available for overnight delivery. Along with the Cisco ASA 5520 firewalls, we also carry many other accessories. |
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ASA 5520 Firewall Base Units | ![]() |
ASA 5520 Firewall Software |
General Information on the Cisco ASA 5520 Firewall

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. With four Gigabit Ethernet interfaces and support for up to 100 VLANs, businesses can easily deploy the Cisco ASA 5520 into multiple zones within their network. The Cisco ASA 5520 Adaptive Security Appliance scales with businesses as their network security requirements grow, delivering solid investment protection.
Businesses can extend their SSL and IPsec VPN capacity to support a larger number of mobile workers, remote sites, and business partners. Businesses can scale up to 750 SSL VPN peers on each Cisco ASA 5520 by installing an SSL VPN upgrade license; 750 IPsec VPN peers are supported on the base platform. VPN capacity and resiliency can be increased by taking advantage of the Cisco ASA 5520's integrated VPN clustering and load-balancing capabilities. The Cisco ASA 5520 supports up to 10 appliances in a cluster, offering a maximum of 7500 SSL VPN peers or 7500 IPsec VPN peers per cluster. For business continuity and event planning, the Cisco ASA 5520 can also benefit from the Cisco VPN FLEX licenses, which enable administrators to react to or plan for short-term bursts of concurrent SSL VPN remote-access users, for up to a 2-month period.
The advanced application-layer security and content security defenses provided by the Cisco ASA 5520 can be extended by deploying the high-performance intrusion prevention and worm mitigation capabilities of the AIP SSM, or the comprehensive malware protection of the CSC SSM. Using the optional security context capabilities of the Cisco ASA 5520 Adaptive Security Appliance, businesses can deploy up to 20 virtual firewalls within an appliance to enable compartmentalized control of security policies on a departmental level. This virtualization strengthens security and reduces overall management and support costs while consolidating multiple security devices into a single appliance.
About Network Liquidators:
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Quality Cisco ASA 5520 Firewalls
Every single Cisco security product that comes through NWEQs shipping dock is physically inspected and put through our thorough testing process. All refurbished NWEQ networking gear comes with a Lifetime Warranty (end-user customers only)! Please inquire with your account representative for more details! Network Liquidators is your online reseller leader for used Cisco ASA 5520 firewalls.
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Below are links to additional Popular Cisco ASA Firewalls:
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Cisco ASA 5500 Firewalls | ![]() |
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Cisco ASA 5510 Firewalls |
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Cisco ASA 5520 Firewalls | ![]() |
Cisco ASA 5540 Firewalls | ![]() |
Cisco ASA 5550 Firewalls |
Buy and Sell Cisco ASA 5520 Firewall Base Units
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Cisco ASA5520-AIP10-K9 Firewall Security Appliance Bundle |
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Cisco ASA5520-AIP20-K8 Adaptive Security Plus Appliance Bundles / Firewall |
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Cisco ASA5520-AIP40-K9 Firewall Security Appliance Bundle |
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Cisco ASA5520-BUN-K9 Firewall Security Appliance Bundle |
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Cisco ASA5520-CSC-PRM-K9 Adaptive Security Plus Appliance Bundles / Firewalls |
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Cisco ASA5520-CSC10-K9 Adaptive Security Plus Appliance Bundles / Firewalls |
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Cisco ASA5520-SSL500-K9 Firewall Security Appliance Bundle |
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