DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual

5.Click Apply to save your settings.

Note: You can also set up the traffic meter for the Ethernet ISP, if desired, at this time. See “Programming the Traffic Meter” on page 2-20.

Configuring the WAN Mode

The WAN ports of the ProSafe Wireless ADSL Modem VPN Firewall Router can be configured for NAT or Classical Routing. You must select one of them—NAT being the most common:

NAT. NAT is the technology which allows all PCs on your LAN to share a single Internet IP address. From the Internet, there is only a single device (the Router) and a single IP address. PCs on your LAN can use any private IP address range, and these IP addresses are not visible from the Internet.The Router uses NAT to select the correct PC (on your LAN) to receive any incoming data.

Note: If you only have a single Internet IP address, you MUST use NAT.

Classical Routing. In this mode, the Router performs Routing, but without NAT. To gain Internet access, each PC on your LAN must have a valid Internet IP address.

If your ISP has allocated many IP addresses to you, and you have assigned one of these addresses to each PC, you can choose Classical Routing. Or, you can use Classical Routing for routing private IP addresses within a campus environment. Otherwise, selecting this method will not allow Internet access through this Router.

Depending on the WAN port configuration of the ProSafe DGFV338, you can select one of two options:

Auto-Rollover using WAN port. If you have configured both the ADSL ISP and Ethernet ISP WAN ports of the ProSafe Wireless ADSL Modem VPN Firewall Router, you can select auto- rollover for increased system reliability. In this mode, the selected WAN interface is made primary and the other is the rollover link. As long as the primary link is up, all traffic is sent over the primary link. Once the primary WAN interface goes down, the rollover link is brought up to send the traffic.

2-14

Basic Installation and Configuration

v1.0, April 2007

Page 44
Image 44
NETGEAR DGFV338 manual Configuring the WAN Mode