NETGEAR Business VPN/Firewall Setup – Best Practices & Common Configuration Issues

Port forwarding exposes an internal resource to the public internet by mapping a public port to a private IP/port (WAN → LAN).

VPN provides a secure tunnel that allows remote users or sites to access internal resources as if they were part of the local network (no port forwarding required for internal access).

Traffic rules (firewall policies) control and restrict access in both cases:

• For port forwarding: traffic is first translated (DNAT), then evaluated by traffic rules before reaching the LAN. For example, you can define which public IP can access port forwarded service.
• For VPN: traffic is decrypted first, then evaluated by traffic rules (typically VPN ↔ LAN). For example, you can define which remote LAN IP(s) can access which local LAN IP(s)

In short: port forwarding and VPN define how traffic gets in, while traffic rules define what is allowed once it arrives.