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IP Setup 6-1
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The Netopia Firmware Version 5.4 uses Internet Protocol (IP) to communicate both locally and with remote
networks. This chapter shows you how to configure the router to route IP traffic. You also learn how to configure
the router to serve IP addresses to hosts on your local network.
Netopia’s IP routing features Network Address Translation and IP address serving.
This section covers the following topics:
■ “IP Setup” on page 6-2
■ “RIP-2 MD5 Authentication” on page 6-10
■ “IP Address Serving” on page 6-17
■ “More Address Serving Options” on page 6-24
■ “DHCP Relay Agent” on page 6-30
■ “Connection Profiles” on page 6-32
■ “Multicast Forwarding” on page 6-34
Network Address Translation allows communication between the LAN connected to the Router and the Internet
using a single (or a few) IP address(es) instead of a routed account with separate IP addresses for each
computer on the network.
Network Address Translation also provides increased security by hiding the local IP addresses of the LAN
connected to the Netopia routers from the outside world.
The setup is simpler, so ISPs typically offer Internet accounts supporting Network Address Translation at a
significant cost savings.
For a detailed discussion of Network Address Translation, see Chapter 3, “Multiple Network Address
Translation.”