Cisco ASA5520-AIP20-K8 6 PortsNetworking Security Appliance Firewall
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ASA5520-AIP20-K8 Cisco ASA 5520 Secuirty Appliance Refurbished

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Part Number#: ASA5520-AIP20-K8
List Price was: $755.00
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Short Description:
ASA5520-AIP20-K8 VPN Security ASA 5520 Appliance Firewall | Made by Cisco | Refurbished

Interface Types of This Product: Security Appliance Firewall

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days
We are providing specifications below to explain why you should consider purchasing the Cisco Firewall Security Appliance Networking, including a general overview, performance specifications, relevant images, media files, and technical information about the ASA5520-AIP20-K8 compatibility.

Performing Software Upgrades

The Cisco ASA 5520 security appliance is a popular firewall device that offers a range of security features, including firewall, VPN, intrusion prevention, and content security. The ASA 5520-AIP20-K8 model comes with an integrated Intrusion Prevention System (IPS) module that provides advanced threat detection and mitigation capabilities.

Performing software upgrades on the Cisco ASA 5520-AIP20-K8 is a straightforward process that involves the following steps:

  • Obtain the new software: Download the new software from the Cisco website or obtain it from another source. Ensure that the software is compatible with the ASA 5520-AIP20-K8 model and that it meets your organization's security requirements.
  • Verify the existing software: Check the existing software version on the ASA 5520-AIP20-K8. This can be done by logging into the device's command-line interface (CLI) and using the "show version" command. Note down the current software version, as this information will be required later.
  • Backup the configuration: Before starting the upgrade process, it is recommended to backup the ASA 5520-AIP20-K8's configuration. This can be done using the device's CLI or the ASDM (Adaptive Security Device Manager) web interface.
  • Upgrade the software: Upload the new software to the ASA 5520-AIP20-K8 using TFTP or FTP. Then, initiate the upgrade process by using the device's CLI or the ASDM web interface. The upgrade process will take several minutes to complete, during which time the device may be unavailable.
  • Verify the new software: Once the upgrade process is complete, verify that the new software version has been installed successfully. This can be done by logging into the device's CLI and using the "show version" command.
  • Restore the configuration: If the upgrade process has been successful, restore the ASA 5520-AIP20-K8's configuration from the backup created earlier.
  • Test the device: After completing the upgrade and restoring the configuration, test the device to ensure that it is functioning correctly and that all security features are working as expected.

Monitoring Network Traffic

The Cisco ASA 5520 Security Appliance is a network security device designed to protect networks from threats and unauthorized access. One of the features of this device is the ability to monitor network traffic using the AIP-SSM-20 intrusion prevention system module.

The AIP-SSM-20 is a dedicated hardware module that provides real-time intrusion prevention capabilities, as well as network traffic monitoring and analysis. This module uses a combination of signature-based and anomaly-based detection techniques to identify and prevent attacks.

To monitor network traffic using the ASA 5520 with the AIP-SSM-20 module, you need to configure it to capture and analyze traffic passing through the device. This can be done by setting up a network capture session, which allows you to capture packets and analyze them using a protocol analyzer.

To set up a network capture session on the ASA 5520, you can use the following steps:

  • Access the ASA 5520 command-line interface (CLI) using a console cable or a remote terminal.
  • Enter privileged EXEC mode by typing the enable command and providing the enable password.
  • Enter configuration mode by typing the configure terminal command.
  • Configure the AIP-SSM-20 module to capture network traffic by typing the following command:

monitor capture mycap interface inside access-list myacl

In this command, "mycap" is the name of the capture session, "inside" is the name of the interface where you want to capture traffic, and "myacl" is the name of the access list that defines the traffic you want to capture.

  • Start the capture session by typing the following command:

monitor capture mycap start

This command starts the capture session and begins capturing packets.

  • Monitor the capture session by typing the following command:

show monitor capture mycap

This command displays the captured packets and provides details about each packet, such as the source and destination addresses, the protocol used, and the packet size.

  • Stop the capture session by typing the following command:

monitor capture mycap stop

This command stops the capture session and saves the captured packets to a file.

Durability and Reliability of ASA 5520 Security Appliance

The ASA5520-AIP20-K8 Cisco ASA 5520 Security Appliance is a network security device that provides firewall, VPN, and intrusion prevention services for small and medium-sized businesses. Durability and reliability are critical aspects of this type of device, as they are designed to provide continuous network protection against various types of attacks.

Durability refers to the ability of the appliance to withstand wear and tear over time, including exposure to harsh environmental conditions and frequent use. The ASA5520-AIP20-K8 is built with high-quality components and is designed to operate in a wide range of environments, from data centers to branch offices. It has a rugged chassis that provides physical protection and is resistant to shock and vibration, making it suitable for use in harsh environments.

Reliability, on the other hand, refers to the ability of the appliance to perform its intended functions consistently and accurately. The ASA5520-AIP20-K8 is designed with a range of features that ensure reliable operation, including redundant power supplies and fans, which ensure that the appliance can continue to operate even in the event of a power or fan failure. The device also includes hot-swappable components, which allow for quick and easy replacement of failed components without the need for downtime.

In terms of performance, the ASA5520-AIP20-K8 is capable of processing up to 450 Mbps of firewall traffic and up to 225 Mbps of VPN traffic. It can also handle up to 280,000 concurrent connections and up to 10,000 new connections per second, making it suitable for use in high-traffic environments. Additionally, the appliance is designed with advanced security features, such as intrusion prevention, anti-virus, and anti-spam filtering, which help to protect against a wide range of security threats.

General Information

  • Manufacturer: Cisco Systems, Inc
  • Manufacturer Part Number: ASA5520-AIP20-K8
  • Type: Networking
  • Sub-Type: Security Appliance
  • Brand Name: Cisco
  • Product Series: 5500
  • Product Model: ASA 5520
  • Product Name: ASA 5520 Secuirty Appliance
  • Product Type: Network Security/Firewall Appliance

Technical Information

  • Virtualization:
  • 750 x IPSec VPN Peer
  • 2 x SSL VPN Peer
  • 750 x SSL VPN Peer
  • 2800000 x Concurrent Session
  • 9000 x Concurrent Session
  • 2 x Security Context
  • 20 x Security Context
  • 150 x Virtual Firewall


  • Total Number of Ports: 6
  • USB: Yes
  • Management Port: Yes
  • Network & Communication
  • Ethernet Technology: Fast Ethernet
  • Network Standard: 10/100/1000Base-T
  • Network Standard: 10/100Base-TX

I/O Expansions:

  • Number of Total Expansion Slots: 2
  • Expansion Slot Type: SSM
  • Number of SSM Slots: 1

Management & Protocols

  • Manageable: Yes
  • Memory:
  • Memory Card Supported: CompactFlash (CF) Card

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.

A proper network security appliance is able to provide you with threat defense, new malware protection, insightful reporting, application control, and more in one solution.

With organizations getting more and more reliant on software for automation and streamlining operations, users are getting strong emotional attachments to their vendors and applications. Advanced level appliances are thus needed to maintain the relationship between you, as an end-user, and the vendors.

Security appliances can be defined as any server appliance form that is created for the protection of your computer networks from undesired traffic. There are various types of security appliances in the market. Some of them include:

  1. Preventative devices: These scan networks and recognize probable security issues like vulnerability assessment appliances and penetration testing.
  2. Passive devices: Sense and reports undesired traffic. An example is intrusion detection appliances.
  3. Unified Threat Management (UTM): Appliances bring together features making one system like content filtering, some firewalls, and web caching.
  4. Active devices: These block undesired traffic. Examples of such are anti-virus scanning devices, content filtering devices, and firewalls.

Here at AllHDD, you can find the best network security appliance choosing from our wide variety of options, we have different products with 1 port, 2 ports, 3 ports, and up to 24 ports!

Security Appliances

There is a wide variety of appliances in the market which address most of the security concerns out there. The challenge is that all vendors claim they are able to achieve what your security requirements are. The preference is that this is done via wireless connection.

It would be great if the claims are determined to a particular degree by an independent body. The body would conduct benchmark tests to guarantee your safety is making some assumptions.

Efficiency of Security Appliances

A massive amount of code is employed in the creation of security appliances like IPS or IDS. Buffer overflows probability against a product management interface (management module) like this one is very high. Purchasing a product like this is essential in the hostile and complex computer environment of today.

You need to be aware of the existence of exploitable problems linked with a snort. Snort is the leading Open Source Intrusion Prevention System (IPS) around the globe. It utilizes a string of rules that aid in the definition of malicious activity on the network. It then uses the rules to locate packets matching against the activities and generates you, as the user, alerts.

Snort may be positioned inline to break off these packets. It has three main uses: Like a packet sniffer such as tcpdump, like a complete network intrusion prevention system, or like a packet logger essential in debugging network traffic. You can download snort and configure it for your business or personal use.

VPN in Security Appliances

A VPN device is a network appliance fitted with advanced security features. VPN appliance, also referred to as Secure Sockets Layer (SSL), is effectively a router offering you firewall protection, authorization, load balancing, and encryption for Virtual Private Networks.

It is a network device that uses a public telecommunication framework like the internet to offer individual users or remote offices secured proprietary data access. One of the commonly used conventions for the management of message transmission security on the internet is SSL. An ideal VPN device should provide multi-platform functionality and central management. It should also be compatible with all crucial network applications.

Security Appliances License

In networking, a network license facilitates many users on one particular TCP/IP network to have shared access to product licenses. The installed Network License Manager (NLM) controls the issuance of licenses to users.

On starting an Autodesk product, you are required to have a license from the license server via the network. If you have a license, NLM will allocate the computer and user starting the program a license. One thus decreases the number of licenses available on the server by one.


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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.

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Shipping Options and Estimated Delivery Time

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UPS® First Overnight - Saturday
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FedEx Shipping Options:

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Worldwide Shipping Options:

UPS®/FedEx® International Economy

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UPS®/FedEx® International Priority

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UPS®/FedEx® Ground Shipping Canada

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Important notes:

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