ASA5525-X/ASA5525-K9 Cisco ASA 5500 Series Firewall Overview
ASA5525-X/ASA5525-K9 Cisco ASA 5500 Series Firewall is a genuine network security and threat protection product from Cisco, a global name in networking whose platforms are used by enterprises, service providers and data-center operators alike. Belonging to the Cisco ASA 5500 Series family, the ASA5525-X/ASA5525-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 5525-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 ASA5525-X/ASA5525-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 ASA5525-X/ASA5525-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.
| ASA5525-X | |
| Product list | |
| Product code | ASA5525-X / ASA5525-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 | 2 (Gbps) |
| Data Link Protocol | Gigabit Ethernet |
| Features | Firewall protection, High Availability, VLAN support, VPN support |
| Network Transport Protocol | IPSec |
| Broadband Transmission Speed | 100 Mbit/s |
| Memory | 8 GB |
| RAM | 12 GB |
| Firewall Throughput | 256 MB/s |
| Encryption Standard | 3DES AES |
| Introduction | The Cisco ASA 5525-X is midrange security appliance that uses the Cisco SecureX framework for a context-aware approach to security that delivers multiple security services, multigigabit performance, flexible interface options, and redundant power supplies. |
| Physical specifications | |
| Width | 16.9 in |
| Height | 1.7 in |
| Depth | 15.6 in |
| Weight | 14. lbs |
| Environmental Parameters | |
| Min Operating Temperature | 23 °F |
| Max Operating Temperature | 104 °F |
| Humidity Range Operating | 0 - 90% |
ASA5525-X/ASA5525-K9 - Deployment Notes
This ASA5525-X/ASA5525-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 ASA5525-X/ASA5525-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.
ASA5525-X/ASA5525-K9 - Deployment Notes
This ASA5525-X/ASA5525-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 ASA5525-X/ASA5525-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.
ASA5525-X/ASA5525-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 ASA5525-X/ASA5525-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 ASA5525-X/ASA5525-K9, which affects software licensing and regional compliance.
