Routers and firewalls have overlapping functions in many modern devices, which can make product comparisons confusing. Routing decides where traffic should go; firewall policies decide which traffic is permitted. Many business gateways perform both jobs, but the capabilities and inspection performance vary considerably.
Understand the main roles
A router forwards traffic between networks and may support NAT, VLANs, VPNs and routing protocols. A firewall applies rules based on addresses, ports, connection state and, on some platforms, application or threat information. A single appliance can provide both functions if its performance and features fit the use case.
Look beyond headline throughput
Security inspection, VPN encryption, logging and many concurrent sessions can reduce real throughput. Compare performance figures that reflect the features you plan to enable. Consider how policies will be maintained and whether the organisation needs reporting, central management or integration with existing security tools.
Design rules around business access
Start with the services that must communicate and deny unnecessary access by default where practical. Keep guest Wi-Fi away from internal systems and restrict remote administration. Review rules periodically as applications change. Browse routers and network security equipment and check the exact model’s feature and performance documentation.
