Netopia R7100, User Reference Manual

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Setting Up Internet Services 2-3
Network Address Translation provides Internet access to the network connected to the Netopia R7100 using
only a single IP address. These routers translate between the internal or local area network (LAN) addresses
and a single external IP address, and route accordingly.
For more information on Network Address Translation, see Chapter 9, “IP Setup and Network Address
Translation.”
Obtaining information from the ISP
After your account is set up, the ISP should send you the IP parameter information that will help you configure
the Netopia R7100.
Local LAN IP address information to obtain
Your ISP will need to provide you with the following information:
■
The default gateway IP address (same as remote IP address in most cases)
■
Local WAN IP address and subnet mask
■
Primar y and secondar y domain name ser ver (DNS) IP addresses
■
Domain name (usually the same as the ISP’s domain name unless you have registered for your own
individual domain name)
Note: The default gateway, WAN address and mask, DNS, and domain name are all obtainable via WAN DHCP,
if your ISP suppor ts it.
With Network Address Translation
If you are using Smar tIP (NAT), you should obtain the following:
■
If you are connecting to a remote site using Network Address Translation on your router, your provider will
not define the IP address information on your local LAN. You can define this information based on an IP
configuration that may already be in place for the existing network. Alternatively, you can use the default IP
address range used by the router.
Without Network Address Translation
If you are not using Network Address Translation, you will need to obtain all of the local LAN IP address
information from your ISP.
If you are not using Smar tIP (NAT), you should obtain:
■
The number of Ethernet IP host addresses available with your account and the first usable IP host address
in the address block
■
The Ethernet IP address for your Netopia R7100
■
The Ethernet IP subnet mask address for your Netopia R7100