Description
Sophos SG 135
The Sophos SG 135 is a desktop firewall appliance designed for organizations that need integrated network security in a compact hardware platform. It forms part of the Sophos SG Series and combines eight Gigabit Ethernet copper interfaces with security processing for firewall, VPN, IPS, and antivirus proxy workloads.
Sophos documentation lists the SG 135 with up to 6 Gbps firewall throughput, 1 Gbps VPN throughput, 1.5 Gbps IPS throughput, and 350 Mbps antivirus proxy throughput. The published specifications also identify support for up to 2,000,000 concurrent connections and 36,000 new connections per second.
Network Connectivity
The SG 135 includes eight fixed Gigabit Ethernet copper ports. This interface configuration allows the appliance to connect to different network segments, switches, servers, and WAN infrastructure without requiring an expansion module.
The eight-port configuration is particularly useful for environments that need multiple physical network connections while maintaining a compact appliance footprint.
Security and VPN
The appliance is designed for network security workloads supported by the SG Series platform. Its published performance specifications cover firewall, VPN, IPS, and antivirus proxy processing.
The SG 135’s published VPN throughput of up to 1 Gbps also makes it applicable to secure network connectivity between sites and remote environments.
Deployment
The SG 135 uses a desktop form factor and can be deployed in offices, branch locations, and other environments where a compact security appliance is preferred.
Sophos documentation lists a rackmount kit as an available accessory. This provides an option for organizations that want to integrate the appliance into an appropriate rack-based infrastructure.
SG Series Position
The SG 135 was positioned within the small desktop section of the Sophos SG Series alongside the SG 125 and wireless variants. The SG Series documentation describes these appliances as suitable for small businesses, branch offices, remote locations, and retail environments.
For organizations evaluating the SG 135 today, it is also important to distinguish the legacy SG platform from Sophos’s newer XGS Series hardware. Sophos has published migration paths for SG customers to newer XGS appliances.
Selection Guide
For Small Business Networks
Consider the SG 135 when the deployment requires a compact firewall appliance with multiple Gigabit Ethernet ports and published performance for firewall, VPN, IPS, and antivirus proxy workloads.
For Branch Offices
Evaluate the number of users, network segments, WAN bandwidth, VPN requirements, and enabled security services before selecting the SG 135.
For Rack Deployment
If the appliance needs to be installed in a rack, confirm availability and compatibility of the appropriate SG 135 rackmount kit before purchasing.
For Existing SG Deployments
Organizations already operating SG Series appliances should verify the exact hardware revision, software environment, licensing status, and current Sophos migration guidance before making a purchasing or replacement decision.
Always Verify
Cross-check the exact appliance revision, current Sophos documentation, licensing requirements, compatibility information, and availability before purchasing an SG 135.
Installation Notes
Place the Sophos SG 135 on a stable surface with adequate airflow around the appliance. Connect the required Gigabit Ethernet interfaces according to the network design, attach the power supply, and connect the management interface as required by the deployment.
If using a rackmount kit, follow the installation instructions supplied with the specific kit and appliance revision. Ensure the appliance is securely mounted and that sufficient airflow is maintained.
After physical installation, configure the appliance according to the applicable Sophos software and network deployment requirements.
Best Practices
Use the SG 135 according to its documented hardware and software capabilities. Before deployment, verify the exact hardware revision and current Sophos support documentation.
Plan network interfaces before installation and label connected ports to simplify troubleshooting. Maintain sufficient ventilation around the appliance and avoid obstructing airflow.
For VPN and security inspection workloads, size the appliance according to actual traffic requirements rather than relying only on headline firewall throughput.
For existing SG 135 installations, maintain documentation of the appliance revision, software version, licenses, network configuration, and migration requirements.
Benefits for IT Teams
The Sophos SG 135 provides a compact platform for centralized network security, with eight fixed Gigabit Ethernet interfaces and published performance figures for major security workloads.
Its desktop form factor can simplify deployment in branch and office environments, while the optional rackmount kit provides an additional installation option.
For IT teams managing existing Sophos SG environments, standardized configuration and clear documentation can also make troubleshooting, maintenance, and future migration planning easier.
Main Benefits
High Firewall Throughput
The SG 135 provides up to 6 Gbps of published firewall throughput.
Benefit: Supports substantial network traffic processing in a compact appliance.
Eight Gigabit Ports
Eight fixed GbE copper interfaces are built into the appliance.
Benefit: Connect multiple network segments and devices without depending on an additional interface module.
Integrated VPN Capability
The SG 135 provides published VPN throughput of up to 1 Gbps.
Benefit: Supports secure site-to-site and remote connectivity requirements.
Intrusion Prevention
The appliance provides published IPS throughput of up to 1.5 Gbps.
Benefit: Helps inspect network traffic as part of an integrated security deployment.
Compact Deployment
The SG 135 uses a desktop form factor while providing performance associated with higher-capacity network security appliances.
Benefit: Fits environments where space and deployment simplicity are important.
Rackmount Flexibility
A rackmount kit is available separately for the SG 135.
Benefit: Allows organizations to adapt the appliance to suitable rack-based installations.
Typical Use Cases
1. Small Business Network Security
The SG 135 can be deployed as a central security appliance for small business networks requiring firewall, VPN, and intrusion prevention capabilities.
2. Branch Office Protection
The compact appliance is suitable for branch environments that need local network security without deploying a larger rack appliance.
3. Multi-Segment Networks
With eight fixed Gigabit Ethernet ports, the SG 135 can connect multiple network segments and infrastructure components.
4. Site-to-Site VPN
Organizations can use the appliance as part of a VPN architecture connecting offices and other secured networks.
5. Rack-Based Deployment
Where appropriate, the separately available rackmount kit can be used to integrate the desktop appliance into a rack installation.
6. Distributed Organization Deployments
The SG Series was designed for distributed organizations and branch environments, making the SG 135 relevant to deployments requiring a consistent security appliance across multiple locations.
Who Should Buy Sophos SG 135?
The Sophos SG 135 is relevant to organizations looking for a compact SG Series firewall appliance with eight Gigabit Ethernet ports and integrated network security capabilities.
It can be considered for:
- Small businesses
- Branch offices
- Remote offices
- Distributed organizations
- Retail environments
- Existing Sophos SG deployments
- Organizations requiring multiple Gigabit Ethernet interfaces
Because the SG 135 is an older SG Series platform, buyers should verify current availability, support status, licensing requirements, and migration options before purchase.
Related Categories
Explore related Sophos product categories for deeper product information:
- Sophos Firewalls
- Sophos SG Series
- Sophos XGS Series
- Sophos Rackmounts
- Sophos Firewall Accessories
- Sophos Network Security Appliances
- Sophos Firewall Licenses
Frequently Asked Questions
What is Sophos SG 135?
Sophos SG 135 is a desktop-form-factor firewall appliance from the Sophos SG Series. It includes eight Gigabit Ethernet copper ports and provides published performance for firewall, VPN, IPS, and antivirus proxy workloads.
How many ports does Sophos SG 135 have?
The SG 135 has 8 fixed Gigabit Ethernet copper ports.
What is the firewall throughput of Sophos SG 135?
The referenced Sophos SG Series specifications list firewall throughput of up to 6 Gbps for the SG 135.
What is the VPN throughput of Sophos SG 135?
The published SG Series specification lists VPN throughput of up to 1 Gbps for the SG 135.
What is the IPS throughput of Sophos SG 135?
The SG 135 is listed with up to 1.5 Gbps IPS throughput in the referenced Sophos specifications.
Does Sophos SG 135 support rack mounting?
Yes. Sophos documentation lists a rackmount kit available separately for the SG 135.
Is Sophos SG 135 a wireless firewall?
The standard SG 135 does not include the integrated wireless functionality identified for the SG 135w variant. Sophos documented the SG 135 and SG 135w as separate models.
How much RAM does Sophos SG 135 have?
The referenced Sophos technical specifications list the SG 135 with 6 GB RAM.
What is the storage capacity of Sophos SG 135?
The referenced SG Series overview lists 320 GB of storage for the SG 135.
Is Sophos SG 135 still a current Sophos firewall?
The SG 135 belongs to the older Sophos SG Series. Sophos has published migration paths from SG appliances to newer XGS Series models, so buyers should verify current availability and support information before purchasing.
