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Sophia Lewis
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Simple and reliable SOHO router. Easy setup and stable performance for small business networks.
CISCO851-K9
Ethernet SOHO Security Router
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Name:
CISCO851-K9
- Description:
- Ethernet SOHO Security Router
- Rating:
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- Brand:
- Cisco
- GTIN:
- 799599486561
- Condition:
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CISCO851-K9 Overview
CISCO851-K9 is a fixed architecture enterprise router engineered with integrated services—including voice and video—and advanced VPN capabilities that secure remote communications. It is powered by redundant AC power supply options and offers dedicated WAN and LAN interfaces to support reliable connectivity in demanding network environments.
CISCO851-K9 delivers consistent performance with competitive throughput capacity and built-in firewall and redundancy features, making it well suited for enterprise, branch, and small business use cases. Its design incorporates modular expansion capabilities, robust routing protocols, and comprehensive integrated services to meet evolving network demands.
CISCO851-K9 price is is available on request. Get immediate quote.
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CISCO851-K9 Specifications
- Product Type
- Enterprise Router
- VPN Support
- IPSec / SSL VPN / N/A
- Power Source
- AC Power Supply / Redundant
- Routing Protocols
- OSPF / BGP / EIGRP / RIP / Static Routing
- Broadband
- N/A
- Architecture
- Fixed
- WAN Configuration
- WAN
- WAN Ports
- 1 WAN
- LAN Ports
- 4 LAN Ports
- Ethernet Technology
- 10/100
- Wi-Fi Standard
- WiFi 4
- Connectivity Type
- Wired
- Network Protocols
- IP, IPv6, QoS
- Remote Management
- Telnet, SSH, SNMP
- Compliance Standards
- FCC, CE
- Wireless Support
- Yes
- Speed/Capacity
- Gigabit
- Firewall Features
- Yes
- Features
- VPN / IPv6 Compatible / Firewall
- Use Case
- Enterprise
- Management
- Managed
- Form Factor
- Desktop
- Integrated Services
- Voice / Video
- High Availability Support
- Not Supported
- Safety
- N/A
- EMC
- N/A
- Telecom
- N/A
- Throughput Capacity
- 0.025 Gbps
- QoS Features
- Supported
- Built-in Security Features
- Firewall / Intrusion Prevention / Malware Protection
- Expansion Slots
- N/A
- Modular Slots Available
- N/A
- Stacking Capability
- No
- 5G Support
- No
- Memory
- 256 MB
- Flash Memory
- 128 MB
- Interface Ports
- RJ-45
- Power
- 22.8 Watt
- Device Type
- Router
- Product Name
- Cisco 851 Wireless Services Router
- Height
- 1.0 inches
- Width
- 9.0 inches
- Depth
- 8.0 inches
- Weight
- 4.5 lbs
CISCO851-K9 Use Case
Secure Remote Branch Connectivity with CISCO851-K9-Ethernet SOHO Security Router
In a multi-site professional services firm, the CISCO851-K9-Ethernet SOHO Security Router establishes site-to-site IPsec VPN tunnels between head office and satellite branches, ensuring encrypted data exchange for client files and billing systems. This deployment delivers enterprise-grade firewall protection, automatic failover on dual-WAN links, and a 40% reduction in network downtime, empowering secure, uninterrupted collaboration across remote offices.
Hardened Retail Point-of-Sale Protection using CISCO851-K9-Ethernet SOHO Security Router
A boutique retailer integrates the CISCO851-K9-Ethernet SOHO Security Router at its storefront to isolate point-of-sale terminals, inventory servers, and guest Wi-Fi on segmented VLANs with advanced intrusion prevention (IPS). By enforcing deep-packet inspection and dynamic access policies, the solution blocks malicious scans, reduces PCI compliance audit time by 50%, and safeguards customer payment data in real time.
Optimized VoIP and Video QoS for Small Business HQ with CISCO851-K9-Ethernet SOHO Security Router
A fast-growing consultancy leverages the CISCO851-K9-Ethernet SOHO Security Router’s built-in Quality of Service (QoS) and application-aware traffic shaping to prioritize VoIP calls and video conferences over general Internet browsing. The result is crystal-clear voice quality, 30% fewer dropped calls, and measurable gains in team productivity during peak usage hours.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 CISCO851-K9 |  CISCO888-SEC-K9 |  CISCO888GW-GN-A-K9 |  C891F-K9 |  C888SRST-K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Fixed | Fixed | Fixed | Fixed | Fixed |
| Broadband | N/A | DSL | N/A | DSL | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection | Firewall, Intrusion Prevention, Malware Protection | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention |
| Compliance Standards | FCC, CE | IEEE 802.3, FCC, CE | FCC, CE | FCC, CE | FCC, CE, UL |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 8.0 inches | 14 inches | N/A | N/A | 7.5 inches |
| Device Type | Router | Router | Gateway | Router | Router |
| EMC | N/A | FCC, CE | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100 |
| Expansion Slots | N/A | N/A | EHWIC, SFP+ | N/A | N/A |
| Features | VPN / IPv6 Compatible / Firewall | VPN, Firewall, QoS, NAT, Routing | VPN, VLAN, QoS, Intrusion Prevention | VPN, Firewall, IPv6 Compatible | VPN / VoIP / IPv6 Compatible / Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 256 MB | 256 MB | 256 MB | 128 MB |
| Form Factor | Desktop | Rack-mount / Desktop | Rack-mount | Desktop | Rack-mount |
| Height | 1.0 inches | 1.5 inches | N/A | N/A | 1.1 inches |
| High Availability Support | Not Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video | Voice, Video, WAN Optimization | Voice, Video, WAN Optimization | Voice, Video, WAN Optimization | Voice / Video |
| Interface Ports | RJ-45 | RJ-45, SFP | RJ-45, SFP | RJ-45 | RJ-45 / SFP |
| LAN Ports | 4 LAN Ports | 4 LAN Ports | 4 LAN Ports | 8 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Modular Slots Available | N/A | N/A | 1 Slot | N/A | N/A |
| Network Protocols | IP, IPv6, QoS | TCP/IP, UDP, ICMP, SNMP | IPv4, IPv6, VPN | TCP/IP, IPv4, IPv6 | IP, PPP, Frame Relay, MLPPP |
| Power | 22.8 Watt | 65 Watt | 75 Watt | 65 Watt | 45W |
| Power Source | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply with Redundancy | AC Power Supply / Redundant | AC Power Supply |
| Product Name | Cisco 851 Wireless Services Router | CISCO888-SEC-K9 | CISCO888GW-GN-A-K9 | Cisco C891F-K9 Integrated Services Router | Cisco C888SRST-K9 |
| Product Type | Enterprise Router | Secure Router | Gateway | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet, SSH, SNMP | SSH, Telnet, SNMP | HTTP, HTTPS, SNMP | SSH, Telnet, SNMP | Telnet, SSH, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing |
| Safety | N/A | UL Certified | N/A | N/A | N/A |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | N/A |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | NEBS | N/A | N/A | N/A |
| Throughput Capacity | 0.025 Gbps | 1 Gbps | 1 Gbps | 0.5 Gbps | 0.15 Gbps |
| Use Case | Enterprise | Enterprise | Enterprise | Enterprise / Small Business | Business |
| VPN Support | IPSec / SSL VPN / N/A | IPSec / SSL VPN / DMVPN | IPSec / SSL VPN | IPSec / SSL VPN | IPSec / SSL VPN / DMVPN / N/A |
| WAN Configuration | WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 1 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 4.5 lbs | 10 lbs | N/A | 7 lbs | 5.5 lbs |
| Wi-Fi Standard | WiFi 4 | N/A | N/A | N/A | N/A |
| Width | 9.0 inches | 17 inches | N/A | N/A | 8.8 inches |
| Wireless Support | Yes | No | No | No | No |
Reviews & Ratings
E
Ethan Davis
4
Cisco 851-K9 offers dependable routing with basic security. Perfect for low-traffic office environments.
L
Liam Walker
5
Solid Ethernet performance and minimal maintenance required. A practical choice for small offices.
O
Olivia Taylor
3
Straightforward configuration and reliable uptime. Handles daily business traffic smoothly.
B
Benjamin Roberts
4
Affordable and dependable Cisco router. Meets our basic networking and security needs well.
Questions & Answers
What is the Cisco 851-K9 Ethernet SOHO Security Router?
The Cisco 851-K9 is a compact security router designed for small office and home office environments, offering integrated firewall, VPN, and wired Ethernet connectivity under Cisco IOS.
How many Ethernet ports does the Cisco 851-K9 provide?
The Cisco 851-K9 includes one 10/100 Mbps WAN port and four 10/100 Mbps LAN ports for secure wired connectivity to your network devices.
Does the Cisco 851-K9 support VPN connectivity?
Yes. It supports up to 5 IPSec VPN tunnels and Dynamic Multipoint VPN (DMVPN) for secure remote access and site-to-site encryption.
What security features are built into the Cisco 851-K9?
The router features Cisco IOS firewall (stateful packet inspection), intrusion prevention system (IPS), Network Address Translation (NAT), and access control lists (ACLs) for comprehensive perimeter defense.