Cisco ASA5520-SSL500-K9 4 x 10/100/1000Base-T LAN, 1 x 10/100Base-TX LAN Networking Security Appliance Firewall
If you need a large quantity of ASA5520-SSL500-K9 product - call us through our toll-free number at (800) 675 5044 or request a quote at live chat and our sales manager will contact you shortly.
Looking for assistance? Connect with one of our experts
+1 (800) 675 5044 (Toll-Free)
FREE Shipping. We are accepting NET 30 Days Purchase Orders. Get a decision in seconds, without affecting your credit.

ASA5520-SSL500-K9 Cisco 5520 Adaptive Security Appliance Refurbished

Availability: In Stock
Part Number#: ASA5520-SSL500-K9
List Price was: $24038.46
Your Price:
You Save: $17788.46 (74% off)

Additional 5% Discount on Checkout


Short Description:
ASA5520-SSL500-K9 5520 Adaptive Security Appliance - 4 x 10/100/1000Base-T LAN, 1 x 10/100Base-TX Local Area Network (LAN) 256 Megabyte (MB) Rack-mountable | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

Content Security Features

The Cisco ASA5520-SSL500-K9 Adaptive Security Appliance provides advanced content security features that are designed to help protect organizations from various types of threats, such as malware, viruses, and spam.

The content security features of ASA5520-SSL500-K9 include:

  • Anti-virus: The ASA5520-SSL500-K9 can scan incoming and outgoing traffic for viruses using its built-in anti-virus feature. This feature is capable of identifying and blocking known viruses and malware, and can also detect new and emerging threats through signature updates.
  • Anti-spam: The anti-spam feature of ASA5520-SSL500-K9 helps prevent unwanted email from reaching users' inboxes. It can filter out spam and phishing emails, and also includes customizable filters that allow administrators to block specific types of email.
  • URL filtering: ASA5520-SSL500-K9 can block access to malicious websites and other sites that violate company policy through URL filtering. This feature allows administrators to create lists of websites to block or allow, based on categories such as social media, gaming, or file sharing.
  • File blocking: The file blocking feature of ASA5520-SSL500-K9 helps prevent the spread of malware through file downloads. It can block downloads of certain file types, such as executable files, scripts, and compressed archives, based on policies set by the administrator.
  • Botnet filtering: The botnet filtering feature of ASA5520-SSL500-K9 helps detect and block traffic from botnets, which are networks of compromised computers that are often used for illegal purposes such as distributing spam, launching denial-of-service attacks, or stealing sensitive data.
  • Data loss prevention (DLP): The ASA5520-SSL500-K9 can also be configured to prevent the unauthorized transfer of sensitive data outside of the organization. This feature includes customizable policies that can detect and block specific types of data, such as credit card numbers or confidential documents.

High Availability (HA) Features

The Cisco ASA5520-SSL500-K9 Adaptive Security Appliance comes with several high availability (HA) features that are designed to ensure maximum uptime and data availability for critical business applications.

The primary HA feature of ASA5520-SSL500-K9 is failover. The device supports both active-passive and active-active failover configurations. In an active-passive configuration, one ASA5520-SSL500-K9 device is designated as the primary (active) firewall, while the other device serves as the secondary (passive) firewall. In case of a failure of the primary device, the secondary device takes over and becomes the active firewall. The failover process is transparent to end-users and applications, ensuring continuity of operations.

The active-active failover configuration provides additional redundancy by allowing both ASA5520-SSL500-K9 devices to operate concurrently in an active-active mode. In this configuration, both devices are actively processing traffic, and any failure on one device is seamlessly taken over by the other device. Active-active failover configuration is particularly useful for environments with high traffic volumes or where load balancing is required.

The ASA5520-SSL500-K9 also supports Stateful Failover, a feature that synchronizes connection state information between the primary and secondary devices. This ensures that established connections are maintained even during failover, minimizing disruption to ongoing transactions.

Additionally, the ASA5520-SSL500-K9 supports Virtual Routing and Forwarding (VRF) to enable the creation of virtual routing domains on the device. VRF allows multiple virtual firewalls to be created on a single physical device, enabling the consolidation of multiple security policies into a single device, while maintaining network separation between different departments or tenants.

Best Practices for Deploying and Configuring

Here are some best practices for deploying and configuring the ASA5520-SSL500-K9 Cisco 5520 Adaptive Security Appliance:

  • Follow a standard deployment model: The ASA5520-SSL500-K9 should be deployed in a manner that aligns with a standard deployment model. For example, the DMZ, inside network, and outside network should be properly defined and segmented.
  • Secure management access: The management access to the ASA5520-SSL500-K9 should be properly secured. The device should be configured to allow only authorized management access, and strong passwords should be enforced.
  • Configure logging: The device should be configured to log all security-related events. This will enable you to detect and investigate security breaches.
  • Implement VPN technology: Implementing VPN technology is critical for securing remote access to your network. The ASA5520-SSL500-K9 provides VPN functionality, and it is recommended that you utilize this functionality.
  • Configure firewall rules: Configure firewall rules that allow only necessary traffic. This will help protect your network from unauthorized access.
  • Enable Intrusion Prevention System: Enable Intrusion Prevention System (IPS) to protect your network from attacks. IPS provides advanced security features such as protocol anomaly detection, signature-based intrusion detection, and more.
  • Implement High Availability: The ASA5520-SSL500-K9 provides High Availability (HA) features that enable you to maintain network connectivity in the event of a hardware or software failure. It is recommended that you implement HA to ensure network uptime.
  • Apply patches and updates: Keep your device up-to-date by applying patches and updates as they become available. This will help protect your network from known security vulnerabilities.
  • Monitor performance: Monitor the performance of your ASA5520-SSL500-K9 to ensure that it is operating efficiently. This will help you to detect and troubleshoot issues before they become critical.
  • Train staff: Ensure that staff members who are responsible for configuring and managing the ASA5520-SSL500-K9 are properly trained. This will help ensure that the device is configured and managed correctly.

General Information

  • Brand Name: Cisco
  • Manufacturer: Cisco Systems, Inc
  • Manufacturer Part Number: ASA5520-SSL500-K9
  • Product Name: ASA 5520 SSL / IPsec VPN Edition - Security
  • Device Type Security appliance

Additional Information

  • RAM Installed: ( Max ) 2 GB
  • Flash Memory Installed: (Max): 256 MB
  • Form Factor: Rack-mountable
  • Connectivity Technology: Wired
  • Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet
  • Features Firewall protection, VPN support, VLAN support
  • Encryption Algorithm Triple DES, AES, SSL
  • Interfaces: 4 x network - Ethernet 10Base-T/100Base-TX/1000Base-T - RJ-45 1 x network - Ethernet 10Base-T/100Base-TX - RJ-45 1 x management - console - RJ-45 1 x serial - auxiliary - RJ-45 2 x Hi-Speed USB - 4 pin USB Type A
  • Power: Device: Power supply - internal
  • Voltage Required: AC 120/230 V ( 50/60 Hz )

Network / Transport Protocol IPSec

  • Performance Firewall throughput : 450 Mbps VPN throughput : 225 Mbps
  • Capacity SSL VPN peers : 500 IPSec VPN peers : 750 Concurrent sessions : 280000

Compliant Standards

  • FCC Class A certified, CISPR 22 Class A, EN 60950, EN 61000-3-2, UL 1950, VCCI Class A ITE, IEC 60950, EN 61000-3-3, CSA 22.2 No. 950, EN55022 Class A, ACA TS001, AS/NZS 3260, FCC Part 15

Expansion Slot(s)

  • Expansion Slot(s) 1 (total) / 1 (free) x expansion slot
  • Enclosure Type Rack-mountable - 1U
  • Performance Firewall throughput : 450 Mbps VPN throughput : 225 Mbps
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.


Please choose your location for calculate shipping cost.


ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

We can provide additional warranty service/support for any product you purchase from us if you need additional warranty coverage before finalizing the order from ALLHDD.Com. You need to ask in live chat/help or call us for more information.

Individual product warranty mentioned on each item product description page/detail page.

Free Technical support on purchased items, our expert consultancy over the phone, by email, by live chat, or by remote login.


Shipping Options and Estimated Delivery Time

UPS Shipping Options:

FREE UPS® Ground (Free shipping to all orders for 48 states!)
Estimated delivery time: 4-7 business days

UPS 3 Day Select®
Estimated delivery time: 3 business days

UPS 2nd Day Air®
Estimated delivery time: 1-2 business days, Delivery by 10:30 AM or 2:00 PM

UPS Next Day Air® Standard Overnight
Estimated delivery time: Overnight 2-5 PM, Standard Overnight Delivery.

UPS Next Day Air® - Priority Overnight
Estimated delivery time: Overnight Delivery (Next Business Day) Delivery by 10:30 AM or 12:00 PM

UPS Next Day Air® First Overnight - Early A.M
Estimated delivery time: Overnight 8:00 AM, Early morning, overnight delivery for your time-critical shipments.

UPS® First Overnight - Saturday
Estimated delivery time: Overnight 8:30 AM – Saturday

FedEx Shipping Options:

FedEx Ground®
Estimated delivery time: (4–7 business days in the contiguous 48 states)
*For residential delivery via FedEx Ground use FedEx Home Delivery®
Estimated delivery time: 4−7 business days, based on the distance to the destination.

FedEx Express Saver®
Estimated delivery time: 3 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states (except Hawaii and Alaska)

FedEx 2Day®
Estimated delivery time: 2 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states

FedEx Standard Overnight®
Estimated delivery time: Next-business-day (by 4:30 PM to U.S. businesses and by 8:00 PM to residences)
Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
Estimated delivery time: Next-business-day (by 10:30 PM to U.S. businesses, noon to most residences)
Available throughout all 50 states

FedEx First Overnight®
Estimated delivery time: Next-business-day (by 8:30 or 9 AM to most areas)
Available throughout all 50 states

Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

Important notes:

  • The processing of orders with Ground Shipping can take up to 24-48 hours. But we try to process all orders the same day.
  • We are not responsible for weather problems that may affect the delivery of goods by carriers. We cannot guarantee the exact delivery time, regardless of the carriers' claims.
  • If you have any specific delivery time requirements, please contact our customer support and someone from our customer service team will be able to help you.
  • You can estimate the shipping cost from the products detail page, also available on the checkout page
  • The shipping cost depends on box dimensions, weight, and zip/postal code
  • To get a FedEx® delivery service you need to mention it on the checkout page notebox.
  • For urgent shipments, please contact our customer service.
  • Shipping cut off 4:00 PM (Monday-Friday) and available blind drop shipment.