ASA5555-X/ASA5555-K9 Cisco ASA5555-X Series Firewall Overview
ASA5555-X/ASA5555-K9 Cisco ASA5555-X Series Firewall is a genuine network security and threat protection product from Cisco, a leading enterprise networking vendor whose Catalyst, Nexus and ISR families power campus, data-center and branch networks worldwide. Belonging to the Cisco ASA5555-X Series family, the ASA5555-X/ASA5555-K9 unit is built to the original factory specification, so it integrates with existing Cisco deployments predictably and behaves exactly as the platform documentation describes. In the network, it is deployed as a standalone unit or as part of a larger managed network, following the standard operating procedures of the platform.
From a specification standpoint, it offers 8 ports for client, server or uplink connectivity. These are the original factory figures for this model, giving administrators a clear picture of what the unit can deliver before it enters service. Standard mounting, cabling and management practices apply, so deployment follows the same procedures as other Cisco hardware already running in the environment.
Typical deployments include perimeter protection with stateful inspection, branch-office security with VPN and threat prevention, and data-center north-south traffic filtering. Organizations commonly source it for refresh programs, capacity expansion and spares management, keeping a tested unit on hand so outages stay short and replacements are predictable. The factory detail for this unit reads: “Cisco ASA 5555-X with SW, 8GE Data, 1GE Mgmt, AC, 3DES/AES”. This makes it a practical choice when original-spec hardware is required at a predictable cost.
Every unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation, including port status, console access and firmware state. Our warranty coverage and responsive technical support protect the purchase after it arrives, and our team can confirm revision levels and software compatibility before you order. For volume requirements we also offer configuration checks and staged delivery options.
Contact our sales team for current availability, lead time and shipping options for the ASA5555-X/ASA5555-K9. We respond quickly with stock status and a firm quote, so you can plan the refresh or expansion with confidence.
Key Specifications
Applications
Perimeter Security
Stateful inspection and threat prevention at the edge.
Branch Protection
Secure branch offices with VPN and UTM.
Data Center
High-throughput filtering for north-south traffic.
Buying a Pre-Owned ASA5555-X/ASA5555-K9
Verify the unit is tested, firmware confirmed, and condition documented. Every unit is fully tested and warranty covered. Contact our team for current stock and availability.
| ASA5555-X | |
| Product list | |
| Product code | ASA5555-X/ASA5555-K9 |
| Product Type | Network Security/Firewall Appliance |
| Form Factor | Rack-mountable |
| Product parameters | |
| Port | 8 |
| Type | Management |
| Connector Type | RJ-45 |
| Connectivity Technology | Wired |
| Data Transfer Rate | 4 Gbps |
| Data Link Protocol | Gigabit Ethernet |
| Network Standard | 10/100/1000Base-T |
| Features | Firewall protection, High Availability, VLAN support, VPN |
| Network Transport Protocol | IPSec |
| Broadband Transmission Speed | 100 Mbit/s |
| Manageable | Yes |
| Standard Memory | 16 GB |
| Flash Memory | 8 GB |
| Firewall Throughput | 512 MB/s |
| Input Voltage | 110V AC 220V AC |
| Introduction | Midsize businesses protecting the Internet edge require the same level of protection as large, enterprise networks. You require enterprise-strength security, but purchasing a firewall that was built to handle the performance needs and budget of a large enterprise would be unnecessary and a waste of company resources. You need a firewall that provides the performance you need at a price you can afford, without compromising security |
| Physical specifications | |
| Width | 16.9 in |
| Height | 1.7 in |
| Depth | 19.1 in |
| Weight | 16.75 lbs |
| Environmental Parameters | |
| Min Operating Temperature | 23 °F |
| Max Operating Temperature | 104 °F |
| Humidity Range Operating | 0 - 90% |
ASA5555-X/ASA5555-K9 - Deployment Notes
This ASA5555-X/ASA5555-K9 security appliance is positioned for the throughput and VPN requirements of its specific SKU tier. Confirm the firewall throughput, VPN tunnel capacity, and interface configuration of this variant against your expected traffic profile before ordering.
For refresh or migration projects, verify the software version and license entitlements applicable to this unit. Our team can confirm the installed software and hardware revision before dispatch.
Every ASA5555-X/ASA5555-K9 unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation, including interface status, console access and firmware state.
ASA5555-X/ASA5555-K9 - Deployment Notes
This ASA5555-X/ASA5555-K9 security appliance is positioned for the throughput and VPN requirements of its specific SKU tier. Confirm the firewall throughput, VPN tunnel capacity, and interface configuration of this variant against your expected traffic profile before ordering.
For refresh or migration projects, verify the software version and license entitlements applicable to this unit. Our team can confirm the installed software and hardware revision before dispatch.
Every ASA5555-X/ASA5555-K9 unit at LinkNewNet is inspected and tested before dispatch, and stock is graded, cleaned and verified for correct operation, including interface status, console access and firmware state.
ASA5555-X/ASA5555-K9 - Cisco Series Notes
This listing is part of the Cisco enterprise networking product family, sourced and tested by LinkNewNet for enterprise deployment. Cisco firewall provides stateful inspection, VPN termination, and threat defense at the network perimeter. It is commonly deployed in internet-edge, site-to-site, and remote-access roles.
Deployment guidance: When planning this ASA5555-X/ASA5555-K9 unit into a network, confirm the software image (IOS/IOS-XE/NX-OS) required, the power and cooling profile, and the upstream/downstream interface types that match your existing infrastructure. For a like-for-like refresh, match the feature set of the units already in service so management and automation behave consistently.
Our Cisco reconditioning process: Every pre-owned Cisco unit at LinkNewNet passes a documented reconditioning flow before dispatch - visual inspection, internal cleaning, firmware verification, port-by-port testing, and configuration reset to factory defaults. This ensures the unit you receive operates reliably and integrates cleanly with your existing Cisco management tools.
Related models in this family: AIR-LAP1142N-E-K9, A9K-750W-AC, ASR1000-ESP40, A9K-2X100GE-TR, ASR1000-6TGE. Compare specifications to confirm the right port density, feature set and uplink options for your deployment.
Model code: K9 = Cryptographic (encryption) software feature set - this suffix indicates the feature set, power, or regulatory variant of the ASA5555-X/ASA5555-K9, which affects software licensing and regional compliance.
