Netopia 4541 - Manual (Page 57)

IP Setup 8-1
C C C Ch h h haa a ap p p pttttee e errrr 8 8 8 8
IIIIP P P P S S S See e ettttu u u up p p p
The Netopia 4541/4542 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 ser ve IP addresses to hosts on your local network.
Netopia’s IP routing features Network Address Translation and IP address ser ving.
This section covers the following topics:
■ “IP Setup” on page 8-2
■ “IP Address Ser ving” on page 8-10
■ “More Address Ser ving Options” on page 8-17
■ “DHCP Relay Agent” on page 8-23
■ “Connection Profiles” on page 8-25
Network Address Translation allows communication between the LAN connected to the Netopia 4541/4542
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 4541/4542 from the outside world.
The setup is simpler, so ISPs typically offer Internet accounts suppor ting Network Address Translation at a
significant cost savings.
For a detailed discussion of Network Address Translation, see Chapter 9, “Multiple Network Address
Translation.”