Quick Reference Guide

ProSafe VPN Firewall 50 FVS338 Reference Manual
Connecting the VPN Firewall to the Internet 2-11
v1.0, January 2010
4. If your ISP has assigned a fixed (static or permanent) IP address, select the Use Static IP
Address radio box and fill in the following fields:
• IP Address. Static IP address assigned to you. This will identify the VPN firewall to your
ISP.
• Subnet Mask. This is usually provided by the ISP or your network administrator.
• Gateway IP Address. IP address of the ISP’s gateway. This is usually provided by the ISP
or your network administrator.
If your ISP has not assigned a Static IP address, select the Get dynamically from ISP radio
box. The ISP will automatically assign an IP address to the VPN firewall using DHCP network
protocol.
5. If your ISP has not assigned any Domain Name Servers (DNS) addresses, select the Get
dynamically from ISP radio box. If your ISP has assigned DNS addresses, select the Use
these DNS Servers radio box. Ensure that you enter valid DNS server IP addresses in the
fields. Incorrect DNS entries may cause connectivity issues.
6. Click Apply to save the settings or click Cancel to revert to the previous settings.
7. Click Test to try and connect to the NETGEAR website. If you connect successfully and your
settings work, then you may click Logout or go on and configure additional settings. To check
on the connection status, click on the Broadband Status link.
Configuring the WAN Mode
The WAN Mode screen allows you to configure how your VPN firewall uses your external
Internet connections (for example, your WAN port or dial-up modem connections), and whether or
not the connection rolls over to a secondary link when there is a failure on the primary link.
• NAT. NAT is the technology which allows all PCs on your LAN to share a single Internet IP
address. Viewed from the Internet, the WAN port on the VPN firewall is configured with a
single IP address—the “public” address. PCs on your LAN can use any “private” IP address
range, and these IP addresses are not visible from the Internet.
– The VPN firewall uses NAT to select the correct PC (on your LAN) to receive any
incoming data and hides internal IP addresses from computers on the Internet.
– If you only have a single Internet IP address, you MUST use NAT.
Note: Domain name servers (DNS) convert Internet names such as www.google.com,
www.netgear.com, etc. to Internet addresses called IP addresses. Incorrect
settings here will result in connectivity problems.