Description
Sophos SG 105W — Next-Generation Firewall

The Sophos SG 105w is an entry-level desktop firewall appliance engineered to bring enterprise-grade threat protection to small office environments. Combining firewalling, intrusion prevention, web protection, and high-speed wireless connectivity, the SG 105w delivers an all-in-one solution that eliminates the need for multiple single-purpose network devices.
Firewall & Wireless Integration Category
Equipped with built-in 802.11ac dual-band Wi-Fi, the appliance provides wireless coverage right out of the box. Its four Gigabit Ethernet ports ensure high-throughput wired connections for local servers, switches, or ISP modems.
Security & Performance
Running the intuitive Sophos UTM ecosystem, the SG 105w protects against advanced network threats through real-time traffic inspection, application control, and deep packet analysis, maintaining operational speed without sacrificing protection.
Selection Guide
For Desktop vs. Rack Placement
The SG 105w comes ready for desktop placement. If mounting in a standard 19-inch rack, pair it with a compatible Sophos rackmount adapter kit (e.g., RM-SR Series).
For Wireless Coverage Requirements
Choose the ‘w’ suffix model (SG 105w) when integrated Wi-Fi is needed in a single physical location. For larger sites requiring multiple access points, pair standard SG models with external Sophos APX series access points.
For Performance Scaling
Verify target user count and bandwidth needs. The SG 105w is ideal for basic small branch needs; for higher port density or throughput requirements, consider larger models in the SG or XGS series.
Installation Notes
Installation takes just a few steps: connect the WAN port to your internet source, connect LAN ports to your switch or local devices, attach the included external wireless antennas, and plug in the external power supply. Access the web-based administrative console via a connected computer to run the initial setup wizard and configure security policies and wireless SSIDs.
Best Practices
Place the appliance in an open location to ensure optimal Wi-Fi signal coverage and proper heat dissipation. Keep firmware updated to maintain current threat definitions and security patches. Regularly back up configuration files prior to applying major system updates. Segment administrative LAN, user LAN, and guest Wi-Fi onto separate subnets or VLANs.
Benefits for IT Teams
- Fast, straightforward initial setup via intuitive web wizards.
- Reduced ongoing maintenance by combining router, firewall, and access point into one box.
- Clear visibility into user traffic, application usage, and blocked security threats.
- Lower total cost of ownership for small-footprint remote office deployments.
Main Feature Categories
1. Integrated Wireless Networking
Features built-in 802.11a/b/g/n/ac Wi-Fi capability with external antennas. Eliminates the extra cost and complexity of deploying external wireless access points for small branch environments.
2. Comprehensive UTM Security
Includes multi-layered protection engines such as Network Protection (Next-Gen IPS, ATP), Web Protection, Application Control, and Email Sandboxing capabilities powered by Sophos UTM software.
3. Wired Interface Connectivity
Equipped with 4 onboard 10/100/1000 Mbps Gigabit Ethernet RJ-45 ports, offering configurable LAN, WAN, and DMZ assignments for flexible small-network deployment.
4. Compact Desktop Form Factor
Fanless, low-power desktop chassis engineered for reliable desktop operation in quiet office environments where dedicated server rack space is unavailable.
Why Use the Sophos SG 105w
- Integrated Wi-Fi reduces total cost of ownership by eliminating separate access point hardware.
- Tested performance matching small office bandwidth demands without bottlenecking traffic.
- Proven Sophos UTM operating system delivering comprehensive threat prevention.
- Small, silent form factor suitable for desk placement or wall mounting in open environments.
- Streamlined management interface allowing easy deployment and day-to-day policy maintenance.
Six Main Benefits
- All-in-One Security
- Integrated firewall, IPS, web filtering, and wireless access point.
- Benefit: Simplifies network architecture and reduces hardware footprint.
- High-Speed Wireless
- Built-in dual-band 802.11ac Wi-Fi support.
- Benefit: Fast, secure wireless access for guest and corporate devices without extra hardware.
- Enterprise Threat Protection
- Powered by SophosLabs threat intelligence for real-time protection.
- Benefit: Shields small sites against malware, ransomware, and zero-day exploits.
- Secure Remote Connectivity
- Advanced site-to-site and clientless HTML5 / IPsec / SSL VPN capabilities.
- Benefit: Seamlessly and securely connects branch workers to central office resources.
- Energy-Efficient & Quiet Operation
- Low operational power consumption in a fanless/quiet desktop unit.
- Benefit: Ideal for open work areas without creating ambient noise or high power draw.
- Simple Centralized Control
- Unified management console for security rules, web controls, and wireless SSIDs.
- Benefit: Reduces administrative overhead for small IT teams and MSPs.
Typical Use Cases
1. Small & Home Office Protection
Deploy as an all-in-one edge router, firewall, and Wi-Fi access point for offices with up to 10–15 users.
2. Branch Office Infrastructure
Connect remote retail or corporate branch locations back to headquarters via encrypted IPsec VPN.
3. Isolated Guest Wi-Fi Networks
Utilize built-in wireless controller features to segment guest wireless traffic safely away from internal corporate data.
4. Retail & Point-of-Sale (POS) Environments
Secure payment processing terminals with dedicated firewall rules and IPS inspection.
5. Managed Service Provider (MSP) Deployments
Standardize branch security deployments using a consistent, easily replicable hardware configuration.
6. Light Industrial / Teleworker Security
Provide enterprise-level threat prevention and VPN tunnels for high-value remote workers and field offices.
Who Should Buy Sophos SG 105w?
Ideal for small business owners, branch office IT managers, MSPs, and teleworkers who require an affordable, compact, and high-performance desktop firewall with integrated wireless networking.
Related Categories
Explore dedicated pages for Sophos Appliances, Sophos Accessories, Sophos Rackmount Kits, and Sophos Access Points for expanded deployment options.
Frequently Asked Questions
What is the Sophos SG 105w?
The Sophos SG 105w is a compact desktop UTM firewall security appliance featuring built-in 802.11ac wireless capabilities, designed for small offices and branch locations.
What does the “w” stand for in SG 105w?
The “w” denotes built-in wireless capabilities, meaning the firewall includes internal Wi-Fi access point functionality with external antennas.
How many network ports does the SG 105w have?
It features 4 onboard 1 Gbps (10/100/1000 Mbps) RJ-45 Gigabit Ethernet ports.
Can the SG 105w be rackmounted?
Yes, while designed as a desktop unit, it can be mounted into a standard 19-inch rack using an optional purpose-built rackmount kit.
What operating system does the SG 105w run?
The SG Series runs Sophos UTM firmware, providing integrated firewall, VPN, IPS, web control, and email protection features.
Is the SG 105w suitable for high-density environments?
The SG 105w is tailored for small office environments with typically up to 10–15 users. Larger deployments should look into higher-tier Sophos appliances.


