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Solid firewall for branch and mid size deployments. Reliable VPN and policy control.
ASA5520-BUN-K9
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ASA 5520 Security Appliance with SW, HA, 4GE+1FE, 3DES/AES,...
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Name:
ASA5520-BUN-K9
- Description:
- ASA 5520 Security Appliance with SW, HA, 4GE+1FE, 3DES/AES, Cisco ASA 5500 Series Firewall Edition Bundles
- Rating:
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- Brand:
- Cisco
- GTIN:
- 818254146913
- Condition:
- Warranty:
- 3
- List Price:
$8,088.00
- Price:
$645.0092% off
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1
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ASA5520-BUN-K9 Overview
ASA5520-BUN-K9 is a rack-mount hardware appliance designed for mid-sized enterprise and branch office environments, delivering robust performance with a stateful inspection firewall that supports advanced security services such as IPS, antivirus, web filtering, and both IPSec and SSL VPN functionalities. Optimized for high-throughput environments, the appliance provides a reliable platform for securing network perimeters with redundant power supplies, integrated port configurations (LAN and WAN with SFP options), and the flexibility to manage deployments via CLI, GUI, or centralized management solutions.
ASA5520-BUN-K9 is engineered for scalability and high availability with active-passive clustering capabilities, making it ideal for consistent, uninterrupted operations in dynamic network settings. Its advanced architecture supports scaling from SMBs to larger enterprise networks while ensuring comprehensive threat prevention and secure connectivity, meeting diverse use cases from remote site VPN access to centralized, enterprise-grade network security.
ASA5520-BUN-K9 price is $645.00, a 92% saving from the Cisco list price of $8,088.00. ASA5520-BUN-K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for ASA5520-BUN-K9 for additional pricing. Browse the full Cisco Asa 5500 Series series or explore all Cisco products.
ASA5520-BUN-K9 Specifications
- Product Type
- Firewall Appliance
- Architecture
- Rack-mount
- Deployment Type
- Enterprise / Branch Office
- Use Case
- VPN / Secure Access / UTM
- Firewall Layer Supported
- Layer 3 / Layer 4
- Power Source
- AC Power Supply
- Redundant Power Supply Supported
- Yes
- Firewall Throughput
- 500 Mbps
- Threat Protection Throughput
- 150 Mbps
- IPS Throughput
- 150 Mbps
- VPN Throughput
- 300 Mbps
- Supported Applications
- N/A
- Centralized Configuration & Reporting
- Cisco Security Manager
- Feature
- Advanced threat protection, stateful inspection, VPN support
- Concurrent Sessions
- 100,000
- Maximum Concurrent Sessions
- 250,000
- Users/Nodes
- Unlimited
- Integrated I/O
- N/A
- New Sessions Per Second
- 10,000
- Supported VPN Types
- IPSec / SSL VPN
- Routing Protocols Supported
- OSPF / BGP / RIP / Static Routing
- Security Services
- Antivirus / Web Filtering / IPS / VPN
- High Availability
- Active-Passive
- Interfaces
- RJ-45 / SFP
- WAN Ports
- 2 WAN
- LAN Ports
- 4 LAN Ports
- Switch Ports
- No
- POE Ports
- No
- Management Options
- CLI / GUI / SNMP
- Logging & Monitoring
- Built-in / External
- Firewall Policies Supported
- Unlimited
- Users Supported
- N/A
- Memory
- 4 GB
- Flash Storage
- 16 GB
- Expansion Slots
- SFP
- Form Factor
- 1 RU
- Rack Units
- 1 RU
- Device Type
- NGFW
- Product Name
- Cisco ASA5520-BUN-K9
- Height
- 1.73 inches
- Width
- 17.3 inches
- Depth
- 19.5 inches
- Weight
- 15 lbs
ASA5520-BUN-K9 Use Case
High-Availability Perimeter Security for Mid-Sized Data Centers
In a mid-sized data center hosting ERP and database clusters, the ASA5520-BUN-K9-ASA 5520 Security Appliance with SW, HA, 4GE+1FE, 3DES/AES, Cisco ASA 5500 Series Firewall Edition Bundles delivers redundant perimeter defense. Deployed in active/standby HA pairs, it enforces uniform policies, secures east-west and north-south traffic with AES-256 encryption, and sustains multi-gigabit throughput. Benefit: 99.99% uptime, seamless failover and centralized management reduce operational risk and lower TCO.
Scalable Site-to-Site VPN for Distributed Retail Networks
Retail enterprises with dozens of storefronts implement the ASA5520-BUN-K9-ASA 5520 Security Appliance with SW, HA, 4GE+1FE, 3DES/AES, Cisco ASA 5500 Series Firewall Edition Bundles to establish resilient site-to-site IPsec tunnels over 4GE interfaces. Centralized configuration templates and hardware HA ensure consistent policy enforcement, PCI DSS compliance and seamless traffic failover. Benefit: streamlined network provisioning, reduced branch-office downtime, and secure customer transactions across all locations.
PCI DSS-Compliant E-Commerce Firewall Protection
E-commerce platforms processing payment cards use the ASA5520-BUN-K9-ASA 5520 Security Appliance with SW, HA, 4GE+1FE, 3DES/AES, Cisco ASA 5500 Series Firewall Edition Bundles to meet PCI DSS requirements. Integrated intrusion prevention, granular user-role access and AES encryption safeguard web and application servers from L3–L7 threats. Benefit: automated compliance reporting, audit readiness and enhanced customer trust with end-to-end data protection.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| ASA5520-BUN-K9 |  ASA5505-SEC-BUN-K9 |  ASA5516-FPWR-K9 |  ASA5545-FPWR-K9 |  ASA5550-BUN-K9 | |
|---|---|---|---|---|---|
| Architecture | Rack-mount | Hardware Appliance | Rack-mount | Rack-mount | Rack-mount |
| Centralized Configuration & Reporting | Cisco Security Manager | Cisco ASDM | Cisco Firepower Management Center | FMC (Firepower Management Center) | Cisco ASDM, SNMP, syslog |
| Concurrent Sessions | 100,000 | N/A | 750,000 | 500,000 | 650,000 |
| Deployment Type | Enterprise / Branch Office | Small Business / Branch Office | Enterprise / Branch Office | Enterprise / Branch Office | Enterprise / Branch Office |
| Depth | 19.5 inches | 11.17 inches | 18.5 inches | 18.5 inches | 20.9 inches |
| Device Type | NGFW | NGFW | NGFW | NGFW | NGFW |
| Expansion Slots | SFP | N/A | SFP | SFP | SFP |
| Feature | Advanced threat protection, stateful inspection, VPN support | Stateful Inspection, VPN, NAT, Firewall | Integrated Firepower Services | Integrated Threat Defense | High Performance Security Services |
| Firewall Layer Supported | Layer 3 / Layer 4 | Layer 3 / Layer 4 | Layer 3 / Layer 4 / Layer 7 | Layer 3 / Layer 4 / Layer 7 | Layer 3 / Layer 4 / Layer 7 |
| Firewall Policies Supported | Unlimited | N/A | N/A | 500 | N/A |
| Firewall Throughput | 500 Mbps | 0.15 Gbps | 2.5 Gbps | 7 Gbps | 750 Mbps |
| Flash Storage | 16 GB | N/A | 128 GB | 64 GB | 16 GB |
| Form Factor | 1 RU | Desktop | 1 RU | 1 RU | 1 RU |
| Height | 1.73 inches | 1.73 inches | 1.75 inches | 1.75 inches | 4.3 inches |
| High Availability | Active-Passive | Active-Passive | Active-Passive | Active-Passive | Active-Passive |
| IPS Throughput | 150 Mbps | N/A | 500 Mbps | 1.6 Gbps | 300 Mbps |
| Integrated I/O | N/A | N/A | 8 | 4 | 8 |
| Interfaces | RJ-45 / SFP | RJ-45 | RJ-45 / SFP | RJ-45 / SFP | RJ-45 / SFP |
| LAN Ports | 4 LAN Ports | 7 LAN Ports | 8 LAN Ports | 8 LAN Ports | 4 LAN Ports |
| Logging & Monitoring | Built-in / External | Built-in | Built-in / Syslog | Built-in / Syslog / Cloud Logging | Built-in / Syslog |
| Management Options | CLI / GUI / SNMP | CLI / GUI / SNMP | CLI / GUI / REST API / SNMP | Cloud / CLI / GUI / Centralized / SNMP | CLI / GUI / SNMP |
| Maximum Concurrent Sessions | 250,000 | 16000 | 750,000 | 1,000,000 | 650,000 |
| Memory | 4 GB | N/A | 8 GB | 8 GB | 4 GB |
| New Sessions Per Second | 10,000 | N/A | 22,000 | 65,000 | 100,000 |
| POE Ports | No | No | No | No | No |
| Power Source | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Cisco ASA5520-BUN-K9 | ASA5505-SEC-BUN-K9 | Cisco ASA5516-FPWR-K9 | Cisco ASA5545-FPWR-K9 | ASA5550-BUN-K9 |
| Product Type | Firewall Appliance | Firewall Appliance | Firewall Appliance | Firewall Appliance | Firewall Appliance |
| Rack Units | 1 RU | N/A | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | Yes | No | Yes | Yes | Yes |
| Routing Protocols Supported | OSPF / BGP / RIP / Static Routing | Static Routing / RIP | OSPF / BGP / RIP / Static Routing | OSPF / BGP / RIP / Static Routing | OSPF / BGP / RIP / Static Routing |
| Security Services | Antivirus / Web Filtering / IPS / VPN | Antivirus / Web Filtering / IPS / VPN | Antivirus / Web Filtering / Application Control / IPS / VPN | Antivirus / Web Filtering / Application Control / IPS / VPN | Antivirus / Web Filtering / Application Control / IPS / VPN |
| Supported Applications | N/A | N/A | N/A | 5 | N/A |
| Supported VPN Types | IPSec / SSL VPN | IPSec / SSL VPN | IPSec / SSL VPN | IPSec / SSL VPN | IPSec / SSL VPN |
| Switch Ports | No | Yes | No | Yes | No |
| Threat Protection Throughput | 150 Mbps | N/A | 250 Mbps | 1.6 Gbps | 450 Mbps |
| Use Case | VPN / Secure Access / UTM | VPN / Secure Access / UTM | VPN / Secure Access / UTM | VPN / Secure Access / UTM | VPN / Secure Access / UTM |
| Users Supported | N/A | N/A | N/A | Unlimited | N/A |
| Users/Nodes | Unlimited | N/A | N/A | Unlimited | N/A |
| VPN Throughput | 300 Mbps | 0.1 Gbps | 1.0 Gbps | 1.0 Gbps | 450 Mbps |
| WAN Ports | 2 WAN | 1 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 15 lbs | 7.85 lbs | 16 lbs | 25 lbs | 39 lbs |
| Width | 17.3 inches | 7.13 inches | 17.5 inches | 17.2 inches | 17.1 inches |
Reviews & Ratings
F
Fahad Saleem
5
Deployed for perimeter security. Stable performance and easy rule management.
L
Luc Moreau
5
Good ASA bundle for standard firewalling needs. Works reliably in production.
D
Derrick Vaughn
4
Consistent operation for site connectivity and security. Minimal downtime.
R
Rafael Santiago
4
Reliable Cisco ASA for everyday security tasks. Easy to keep running.
Questions & Answers
What is the Cisco ASA5520-BUN-K9 Security Appliance?
The Cisco ASA5520-BUN-K9 is a bundled security solution comprising an ASA 5520 firewall appliance, software image, high-availability license, four Gigabit Ethernet and one Fast Ethernet ports, and 3DES/AES encryption support.
Which hardware and software components are included in the ASA5520-BUN-K9 bundle?
The bundle includes an ASA 5520 chassis, Cisco ASA 5500 Series Firewall Edition software, high-availability (HA) licensing, four GE plus one FE interfaces, and built-in 3DES/AES VPN encryption.
What firewall throughput can I expect from the ASA 5520?
The ASA 5520 delivers up to 300 Mbps of firewall throughput and up to 50 Mbps of IPsec VPN throughput under typical conditions.
How does the ASA 5520 support high availability?
With the included HA license, two ASA 5520 units can operate in active/standby mode for stateful failover, ensuring continuous security during hardware or software events.
What network interfaces are available on the ASA 5520?
The ASA 5520 provides four Gigabit Ethernet and one Fast Ethernet interfaces, all PoE-ready and configurable for VLAN trunking and security zones.
Which VPN and encryption protocols does the ASA 5520 support?
It supports site-to-site IPsec VPN, remote access SSL and IPsec VPN, and hardware acceleration for 3DES, AES-128, and AES-256 encryption.
How do I configure and manage the ASA 5520 appliance?
You can manage the ASA 5520 via the Cisco Adaptive Security Device Manager (ASDM) GUI or CLI over SSH/Telnet, with step-by-step wizards and extensive command reference.
What licensing is included in the ASA5520-BUN-K9 bundle?
The bundle includes the Base Firewall, anyconnect essentials, advanced security plus, and high-availability licenses for comprehensive protection and scalability.
Can I deploy the ASA 5520 as a VPN concentrator?
Yes. The ASA 5520 supports up to 250 IPsec VPN tunnels for site-to-site or remote-access connections, making it suitable for mid-sized VPN deployments.
What advanced firewall features does the ASA 5520 offer?
It offers stateful packet inspection, deep packet inspection, application-layer gateway services, intrusion prevention (with add-on IPS), and Identity Firewall.
How many concurrent sessions can the ASA 5520 handle?
The ASA 5520 supports up to 100,000 concurrent connections and up to 250,000 new connections per second under optimal licensing.
What are the recommended deployment scenarios for the ASA 5520?
Ideal for medium-sized enterprise or branch office deployments requiring robust firewalling, VPN services, and high availability at the perimeter edge.
How do I update the ASA 5520 software and firmware?
You can download the latest ASA OS image and patch bundles from Cisco.com and install them via ASDM or CLI using the copy and upgrade commands.
What support and warranty options are available for the ASA5520-BUN-K9?
Cisco offers a one-year hardware warranty, with optional SMARTnet service for 24/7 support, software updates, and advanced hardware replacement.
How can I troubleshoot common issues on the ASA 5520?
Use built-in debug, show, and logging commands in the CLI, review ASDM reports, and consult Cisco’s online troubleshooting guides or TAC support.
Is the ASA 5520 energy efficient?
Yes. The ASA 5520 meets ENERGY STAR guidelines, consumes under 75 W in normal operation, and features low-power standby modes.