Netgear VPN Firewall 200 FVX538 Manual Do Utilizador

C-6

Network Planning for Dual WAN Ports

The areas that require planning when using a firewall that has dual WAN ports include:

•

Inbound traffic (e.g., port forwarding, port triggering, DMZ port)

•

Virtual private networks (VPNs)

The two WAN ports can be configured on a mutually-exclusive basis to either:

•

Rollover for increased reliability, or

•

Balance the load for outgoing traffic.

These two categories of considerations interact to make the planning process more challenging.

Unrequested incoming traffic can be directed to a PC on your LAN rather than being discarded. 
The mechanism for making the IP address public depends on whether the dual WAN ports are 
configured to either roll over or balance the loads. See 

 for further 

discussion.

A virtual private network (VPN) tunnel provides a secure communication channel between either 
two gateway VPN firewalls or between a remote PC client and gateway VPN firewall. As a result, 
the IP address of at least one of the tunnel end points must be known in advance in order for the 
other tunnel end point to establish (or re-establish) the VPN tunnel. See 

 for further discussion.

Note: Once the gateway firewall WAN port rolls over, the VPN tunnel collapses and must 

be re-established using the new WAN IP address.