Cisco ASA5520-BUN-K9 5 Ports Security Appliance
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ASA5520-BUN-K9 Cisco ASA 5520 5 Ports Network Security Refurbished

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Part Number#: ASA5520-BUN-K9
List Price was: $97.02
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Short Description:
ASA5520-BUN-K9 ASA 5520 5 Ports 10/100Base-TX, 1000Base-T, 2x Expansion Slots Manageable Fast Ethernet Firewall Edition Network Security Appliance | Made by Cisco | Refurbished

Interface Types of This Product: Firewall 10-100-1000

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days
We are giving specifications below, why one should consider procuring Cisco 10-100-1000 Firewall Networking features, a general overview, description, performance specification, relevant images, a competitive price infographic, and technical information about the ASA5520-BUN-K9 model with compatibility.

Cloud Network Security Appliances

The Cisco ASA 5520 (ASA5520-BUN-K9) is a network security appliance that provides advanced security features for mid-size enterprise networks. It has 5 Ethernet ports and can handle up to 1 Gbps of firewall throughput.

The appliance integrates multiple security functions, including firewall, VPN, and intrusion prevention, into a single device, simplifying network security. The ASA 5520 also includes features such as:

  • Stateful inspection firewall: inspects all inbound and outbound traffic, providing detailed protection against network attacks
  • VPN support: provides secure remote access for teleworkers and remote offices
  • Intrusion Prevention System (IPS): blocks threats in real-time, including malware, buffer overflows, and protocol exploits
  • Content security: helps protect against spam, viruses, and other malicious content
  • Advanced threat defense: integrates with other Cisco security technologies, such as the Cisco Threat Grid, to provide advanced threat detection and response capabilities

Virtual Private Network (VPN) Appliances

The Cisco ASA 5520 5 Ports Network Security Appliance (ASA5520-BUN-K9) is a security appliance that provides multiple security functions, including firewall, VPN, intrusion prevention, and malware protection. Among these functions, the Virtual Private Network (VPN) feature is particularly important in securing remote access to an organization's network.

A VPN appliance creates a secure and encrypted connection between remote devices and the organization's network. With VPN, remote users can access network resources as if they were physically present at the organization's site. This allows remote users to securely access sensitive data and collaborate with other team members as if they were working in the same physical location.

The Cisco ASA 5520 VPN appliance supports multiple VPN protocols, including IPsec, SSL, PPTP, and L2TP, providing organizations with flexible options to meet different security and performance requirements. The appliance also supports advanced VPN features such as site-to-site VPN, remote access VPN, and VPN failover, ensuring that VPN connectivity is always available even in the event of network failures.

In addition, the ASA 5520 VPN appliance integrates with other security functions, such as firewall and intrusion prevention, to provide a comprehensive security solution. This helps organizations to secure their network and protect sensitive data from unauthorized access and attacks.

Key Features of Network Security Appliances

The ASA5520-BUN-K9 Cisco ASA 5520 5 Ports Network Security Appliance is a high-end security appliance designed to provide comprehensive network security solutions. Here are the key features of this network security appliance:

  • Firewall: This appliance is equipped with a firewall that is capable of filtering incoming and outgoing network traffic based on predefined security policies. The firewall also includes stateful inspection, which tracks the state of network connections and filters traffic accordingly.
  • VPN: This appliance provides support for Virtual Private Network (VPN) solutions, including remote access VPN and site-to-site VPN. This allows secure remote access to the network from any location and secure communication between two sites.
  • Intrusion Prevention System (IPS): The ASA 5520 includes an IPS that can detect and prevent various types of network attacks, including malware, viruses, and other security threats. This feature provides an extra layer of protection to the network.
  • Content Security: This appliance includes features to protect against web-based security threats, such as web filtering, anti-spam, anti-virus, and anti-spyware. These features help protect against malicious content that can enter the network through the internet.
  • High Availability: The ASA 5520 includes high-availability features that ensure the continuous availability of network security services even in the event of a hardware failure. This includes redundancy for power supplies and hot-swappable components.
  • Management: The ASA 5520 provides a user-friendly graphical interface for configuring and managing network security services. This makes it easier for administrators to configure and manage security policies, monitor network traffic, and troubleshoot issues.

General Information about this Cisco ASA5520-BUN-K9

  • Manufacturer: Cisco
  • Model Number or SKU# ASA5520-BUN-K9
  • Product Series: 5500
  • Product Model: ASA 5520
  • Product Name: ASA 5520 VPN/Firewall
  • Product Type: Network Security/Firewall Appliance

Technical Information of Security Appliance

  • Virtualization-
  • 280000 x Concurrent Session
  • 750 x IPSec VPN Peer
  • 2 x Web VPN Peer
  • 750 x Web VPN Peer
  • 9000 x Concurrent Session
  • 20 x Security Context
  • 2 x Security Context

Interfaces/Ports for this 5 Ports Security Appliance

  • Total Number of Ports: 5
  • USB: Yes
  • Management Port: Yes

Network & Communication for Firewall Appliance

I/O Expansions

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

Management & Protocols

  • Manageable: Yes
  • Memory
  • Standard Memory: 512 MB
  • Memory Technology: DRAM
  • Flash Memory: 64 MB
  • Memory Card Supported: CompactFlash (CF) Card

Dimensions & Weight

  • Height 1.8 inch
  • Width 17.5 inch
  • Depth 13.2 inch
  • Weight (Approximate) 20 Lbs


  • UL 60950, CSA C22.2 No. 60950, EN 60950 IEC 60950, AS/NZS60950

Electromagnetic Compatibility

  • (EMC) CE marking, FCC Part 15 Class B, AS/NZS CISPR22 Class B, VCCI Class B,
  • EN55022 Class B, CISPR22 Class B, EN61000-3-2, EN61000-3-3

Industry Certifications

  • FIPS 140-2 Level 2. In process: Common Criteria EAL4+ US DoD ApplicationLevel Firewall for Medium-Robustness Environments, and Common Criteria
  • EAL4 for IPsec/SSL VPN

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.

Firewalls are used within a network to monitor both incoming and outgoing traffic by applying a set of rules/firewall policies to all data packets. Network firewall is an essential security device that is used to stop unauthorized access to private networks with access to the internet. Firewalls are particularly important for intranets, where they are configured to have all data entering or leaving a network passing through it.

Traffic emanating from nefarious or unsecured sources will be analyzed carefully and blocked to prevent the entry of viruses and malicious code. Firewalls act as frontline guards where information exchange with external devices occurs. A firewall ensures that a trusted source addresses reach the final destination. For example, source address is allowed to reach destination over port 22. The traffic is further filtered to ensure that only designated traffic reaches certain destination ports.

We have software and hardware firewalls, encryption accelerator modules, firewall expansion modules to ensure that your network and all its components are secured. A software firewall is installed on a computer and helps to regulate traffic through ports and applications. A software firewall is provided by an OS or network device manufacturer and will not be effective against sophisticated network breaches. The hardware networking firewall is actually physical equipment that is installed to act as protection between a network and the gateway. It could be a standalone product typically designed for corporate/enterprise networks or as a built-in component in a router or other networking devices. Hardware firewalls will have a minimum of 3 ports to allow connection to multiple systems. Bigger firewalls including 5 port, 6 port, and 8 port options or more are available depending on need and network configuration.

You can choose from any of the following types of firewalls according to your needs and network configuration.

Packet filtering firewalls: These are the most popular types of network firewall solutions. They work by analyzing data packets and allowing or blocking them per the established ruleset. Packets that match the source IP address and the destination IP addresses are allowed into the network. There are two types of packet filtering firewalls: stateful firewalls and stateless firewalls. Stateful firewalls are considered more secure and remember the information of previously passed packets. Stateless firewalls lack context and analyze packets independently, which predisposes them to hackers.

Next-generation (NGFW) firewalls: They offer deep packet inspection as well as additional functions including intrusion prevention, encrypted traffic inspection and antivirus. The deep packet inspection function goes beyond examining packet headers and will inspect data in the packet to ensure users can identify, categorize and stop packets containing malicious data.

Proxy firewalls: The proxy firewalls act as intermediaries between two systems and help filter network traffic at the application level. Clients must make a request to the firewall so that it is evaluated against the set security rules before being blocked or permitted. Specifically, proxy firewalls evaluate network traffic for HTTP and FTP protocols and employ deep packet inspection for purposes of identifying and stopping malicious traffic.

Network address translation (NAT) firewalls: These firewalls are used with multi-device setups and will allow all independent network addresses to use a single IP address to connect to the internet. The individual IP addresses are concealed for security purposes since attackers cannot capture the individual network addresses. NAT firewalls also act as intermediaries between multiple devices and external traffic.

Stateful multilayer inspection firewalls: SMLI firewalls filter packets at the transport, application layer, and network layer and compare them to trusted packets. SMLI firewalls work in a similar manner to NGFW firewalls by performing deep packet analysis and allowing a packet to pass only after passing each individual layer. Just as the name suggests, the firewall will ascertain the state of the communication to ensure it is taking place between trusted sources.

We help match businesses with the most suitable network firewall to establish full-spectrum security, ensure uninterrupted network availability, and allow robust access to applications on the cloud.

Here, you can check more available conditions of your desired product ASA5520-BUN-K9 at a competitive price. We are trying our best to meet your needs on the enterprise-level computer, server, data centre, and networking hardware. You are welcome to ask our live chat or get live representative support over the phone.

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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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Worldwide Shipping Options:

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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.
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