Firewall sizing – should be a science but partially remains an art
July 28, 2025 ·
There are too many considerations when deciding on the right model of a firewall. What should be mean CPU load, how many interfaces, how packet sizes and protocols affect performance, what are my maximum bandwidth utilisation, how many users, what security features should be enabled and how granular should be configuration settings, should we future-proof it … and do so on.
Key Items
You can also keep it simple and mainly focus on a few key items:
Firewall Throughput: That should be more than you get from an internet provider
Threat Protection Throughput: Should be more than your all users' typical bandwidth utilisation
Expected VPN Throughput: Ensure it meets your remote access and site-to-site VPN requirements.
Sizing tool
Our sizing tool is designed to help you to narrow down your choices, at the end your budget is likely going to dictate the final choice.
You can also reach out to us and see if we can get you an awesome deal that will get you a firewall you really want.