Barracuda Load Balancer ADC
Barracuda Load Balancer ADC. Built for uptime. Sized for your traffic.
Four hardware models, from compact 1U branch appliances to fullsize data center units, covering 1.2 Gbps to 5 Gbps throughput and up to 250 real servers per appliance. Layer 4/7 load balancing, SSL offloading, and integrated web application security all ship in the same box. Pick the model that matches your traffic and your server count. We ship the same day you order.
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Load Balancer ADC 340
Entry-level ADC for small offices and branch locations. Delivers 1.2 Gbps throughput, 4,000 SSL TPS, and four 1Gb copper ports in a compact 1U chassis. Reliable Layer 4/7 load balancing at a price that fits smaller IT budgets.
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Load Balancer ADC 440
Mid-entry model stepping up to 2 Gbps throughput and 6,000 SSL TPS with four 1Gb copper ports. A natural fit for organizations running multiple web applications that need granular traffic policies, cookie persistence, and application health monitoring.
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Load Balancer ADC 540
Steps up to 4 Gbps throughput and 15,000 SSL TPS in the same compact 1U Mini form factor. Eight 1Gb copper ports standard, expandable to 16. Right-sized for mid-size data centers running high-traffic applications with strict uptime requirements.
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Load Balancer ADC 640
The performance step-up for demanding production environments. Five Gbps throughput, 30,000 SSL TPS, and eight 1Gb copper ports expandable to 32. Built for large data centers and multi-tier applications where downtime is not an acceptable outcome.
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Licenses & Renewals
Keep your Barracuda Load Balancer ADC covered with current support and software subscriptions. Energize Updates keep firmware current. Support plans add phone and chat access to Barracuda technical engineers.
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| Series | Best For | Real Server Support | Form Factor | Key Feature |
|---|---|---|---|---|
| Load Balancer ADC 340 | Small offices and branch deployments | Up to 35 servers | 1U Mini Rack | 1.2 Gbps throughput, 4,000 SSL TPS |
| Load Balancer ADC 440 | Growing web application teams | Up to 50 servers | 1U Mini Rack | 2 Gbps throughput, 6,000 SSL TPS |
| Load Balancer ADC 540 | Mid-size datacenter environments | Up to 100 servers | 1U Mini Rack | 4 Gbps throughput, 15,000 SSL TPS |
| Load Balancer ADC 640 | High-traffic production sites | Up to 250 servers | 1U Fullsize Rack | 5 Gbps throughput, 30,000 SSL TPS |
Barracuda Load Balancer ADC FAQ
A basic load balancer routes traffic across servers at the network layer. The Barracuda Load Balancer ADC operates at Layers 4 through 7, meaning it can inspect HTTP headers, route requests based on URL paths or cookies, and enforce application-layer security rules. It also handles SSL offloading, application acceleration, and server health monitoring, so your backend servers spend their cycles on application logic instead of encryption overhead.
The 340 is a fit for small offices and branch locations with up to 35 servers and 1.2 Gbps of traffic. The 440 handles growing web teams with up to 50 servers and 2 Gbps throughput. The 540 is built for mid-size data centers needing up to 100 servers and 4 Gbps. The 640 covers high-traffic production environments managing up to 250 real servers at 5 Gbps. Our team can help you size the right model based on your server count, peak concurrent sessions, and SSL volume.
Yes. The Barracuda Load Balancer ADC includes integrated WAF capabilities that protect web applications from OWASP Top 10 threats, SQL injection, cross-site scripting, and other common attack vectors. You get Layer 7 application security built into the same appliance handling your load balancing and SSL offloading, without adding a separate WAF in-line.
Yes. All four hardware models support active-passive and active-active HA clustering. Configuration and session state synchronize between the pair so failover is transparent to end users. If one appliance loses power or a network link, traffic moves to the standby unit without dropping active sessions.
SSL offloading moves the work of encrypting and decrypting HTTPS traffic from your backend servers to the Load Balancer ADC. That frees CPU cycles on your application servers so they handle more requests with the same hardware. The 340 processes 4,000 SSL transactions per second, the 440 handles 6,000, the 540 handles 15,000, and the 640 handles 30,000, so there is a model sized to your certificate volume.
Yes. Barracuda offers the Load Balancer ADC Vx for VMware, Hyper-V, and KVM hypervisors, as well as deployments on AWS and Azure. The Vx line uses the same management interface as the hardware appliances. If you are running a hybrid environment, you can manage hardware and virtual instances together.
Not sure which Barracuda Load Balancer ADC is right for you?
Tell us your peak concurrent sessions, the number of backend servers you need to balance, and whether SSL offloading or WAF is a hard requirement. A certified engineer will recommend the right model and walk you through licensing options in one call.
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