Gaining a clear scope of the next firewall scalability for your network security is a long-term infrastructure decision. It’s going to affect angles like security effectiveness, performance, and total costs over time.
A next generation firewall appliance is a core component of modern IT security. The tech generally focuses on combining traffic inspection, threat prevention, app control, and encrypted traffic handling, to name a few. Poor scalability planning leads to performance bottlenecks, rushed upgrades, and weakened security controls. This article focuses on where to find the limitations so you can better gauge the scalability of a certain firewall model.
Key Takeaways:
- Real-world network performance defines the true scope of firewall scalability
- Concurrent connections and session capacity are critical to memory and CPU limits
- VPN limits impact growth and remote access, an important focal point for hybrid work environments
- Licensing and feature tiers create hidden ceilings aside from hardware specs alone
- Factoring in expected users, sites, cloud traffic, renewals, and professional services ensures long-term network scalability
What Scalability Really Means in a Next Generation Firewall Appliance
Firewall scalability is about sustained real-world performance, not just advertised throughput numbers you find in the datasheets. Raw firewall throughput is often measured under ideal, stateless conditions that don’t reflect production traffic.
Here are a few relevant points to consider:
- Real performance can drop once security services are up and running
- NGFW features are cumulative, meaning each enabled service compounds resource usage
- Certical scaling involves upgrading to a larger firewall appliance with a higher inspection capacity
- Horizontal scaling uses High Availability pairs, clustering, or load distribution to share traffic across devices
Moreover, NGFW features like deep packet inspection, IPS, and TLS decryption all have an effect on performance behavior. In many ways, scalability depends heavily on aspects like firewall architecture, memory, CPU design, and feature enablement. Understanding the true scalability of your business IT security solutions helps you avoid premature upgrades and security bottlenecks.
The Core Specs That Define Next Firewall Scalability
Regardless of which next generation firewall vendors you decide to work with, scalability is defined by real security workloads. You shouldn’t base your decision on advertised firewall speed alone.
For example, encrypted traffic can be a major performance limiter, which is why it needs to be factored into long-term firewall sizing decisions. From reviewing threat protection throughput, session capacity, and VPN scalability, reviewing them all is a part of ending up with the right network and security solutions. Check out the table below for a little more insight into how you can define true firewall scalability.
| Category | Key Factor | Why It Matters |
|---|---|---|
| Threat Protection | IPS, Malware, and Sandboxing | DPI can reduce effective throughput |
| Threat Protection | SSL/TLS Decryption | Major limiter as encrypted traffic is resource-intensive |
| Concurrent Connections | Active Sessions | Each session consumes memory and CPU; high volumes can exhaust capacity |
| Concurrent Connections | SaaS and Cloud Apps | Persistent connections from cloud apps and background services dramatically increase session load |
| VPN Scalability | SSL/IPsec VPNs | Tunnel limits can restrict remote user access and degrade performance during heavy VPN usage |
| VPN Scalability | Site-to-Site VPNs | Even predictable tunnels consume processing resources and should be factored into scalability planning |
Thankfully, many modern next generation firewall vendors have multiple options in their lineup. If one model doesn’t have what you need, there’s generally always an option to scale up. SonicWall NGFW options are a great example of this, as they do well to consider the lifecycle of IT demands for all businesses, small and large.
The Hidden Scalability Ceiling of Licensing and Feature Tiers
Aside from the hardware itself, licensing and feature tiers are an important consideration as well. They can come with hidden scalability ceilings that go beyond raw hardware performance alone.
Subscription models determine which advanced security services can be enabled. This ranges from IPS, sandboxing, web filtering, and more. However, enabling all available services on a lower-tier appliance can significantly reduce effective throughput.
It’s important to remember that every security service consumes CPU and memory. In some cases, dedicated cores, too, all of which can lead to hidden performance bottlenecks. Factoring licensing and renewals into your network growth strategy guarantees the NGFW remains secure and future-ready.
How to Choose the Right Next Firewall for Long-Term Business IT Security
Choosing the right NGFW requires planning for both current needs and future growth. Businesses should ask about long-term security features, expected users, sites, VPNs, and more.
Below are several key factors you’ll want to keep in mind here:
- Always factor in expected cloud and SaaS growth
- Make sure your choices are aligned with long-term business goals
- Plan for long-term scalability to avoid premature replacements and bottlenecks
- Budget for expansion, allocating resources for renewals, feature upgrades, and licensing
While this can all sound like a lot to handle, there are many ways to streamline the entire process. Many businesses work with professional services to help take a lot of the weight out of their decision-making.
Services like this help with planning, implementation, and maintenance of scalable firewall solutions. Not to mention proactive measures on any upcoming change your business network will face down the road.
Let’s Wrap Up
Scalability is multi-dimensional, from real-world performance to session capacity, VPN limits, and the list goes on. Choosing your next firewall should be under the guise of future-proofing your network from premature changes and unwanted bottlenecks.
On top of hardware features and license tiers, the vendors you work with matter just as much. Our team at Firewalls.com can help guide your decision-making in the right direction. We help you navigate the potential limitations and educate you on the best possible security solution.
FAQ
What Does Firewall Scalability Really Mean?
Firewall scalability refers to a device’s ability to handle growing network traffic. This includes user connections and security services over time without performance degradation.
Why Shouldn’t I Rely Solely on Advertised Throughput Specs?
Throughput specs are often measured under ideal, stateless conditions. Enabling security features like deep packet inspection, IPS, and TLS decryption can significantly reduce effective performance.
How Does Licensing Affect Scalability?
Licenses determine which advanced security services can be enabled. Utilizing all available features on a lower-tier appliance can create hidden bottlenecks, limiting overall performance.
How Can I Plan for Future Cloud and SaaS Growth?
When sizing a next generation firewall appliance, factor in the expected increase in cloud traffic and SaaS usage. Persistent connections can dramatically increase session loads and CPU usage.
What Role Do Professional Services Play in Firewall Scalability?
Professional services help businesses plan, implement, and maintain scalable NGFW solutions. They ensure hardware, licensing, and network architecture align with long-term growth and security goals.
