Connecting The Sonicwall To The Network; Configuring Your Sonicwall To Access The Internet - SonicWALL TELE3 SP Installation Manual

Connecting the SonicWALL to the Network

Important: Before installing the SonicWALL on your network, register your appliance on the
user registration Web site located at http://www.mysonicwall.com. It is strongly recommended
that you create a user account before installing your SonicWALL and register any services and
upgrades for your SonicWALL. As a registered user, you have access to the SonicWALL
technical support Web site.

Configuring your SonicWALL to Access the Internet

Three common network configurations, NAT Enabled, NAT with PPPoE Client, and NAT
with DHCP Client are included in this chapter. Standard mode configuration is also included
in this chapter. However, if you want to enable the WAN Failover feature of the TELE3 SP, you
cannot configure the TELE3 SP in Standard mode.
Network Address Translation (NAT) Enabled
Using NAT to set up your SonicWALL eliminates the need for separate IP addresses for all
computers on your LAN. It is a way to conserve IP addresses available from the pool of IPv4
addresses for the Internet. If you do not have enough individual IP addresses for all computers
on your network, you can use NAT for your network configuration.
Essentially, NAT translates the IP addresses in one network into those for a different network.
As a form of packet filtering for firewalls, it protects a network from outside intrusion from
hackers by replacing the internal (LAN) IP address on packets passing through a SonicWALL
with a "fake" one from a fixed pool of addresses. The actual IP addresses of computers on the
LAN are hidden from outside view.
Instructions for configuring NAT Enabled Mode begin on page 16.
NAT with PPPoE Client
NAT with PPPoE Client is a network protocol that uses Point to Point Protocol over Ethernet
to connect with a remote site using various Remote Access Service products. This protocol is
typically found when using a DSL modem with an ISP requiring a user name and password to
log into the remote server. The ISP may then allow you to obtain an IP address automatically
or give you a specific IP address.
Instructions for configuring NAT with PPPoE Client mode begin on page 22.
NAT with DHCP Client
NAT with DHCP Client is a networking mode that allows you to obtain an IP address for a
specific length of time from a DHCP server. The length of time is called a lease which is renewed
by the DHCP server typically after a few days. When the lease is ready to expire, the client
contacts the server to renew the lease. This is a common network configuration for customers
with cable or DSL modems. You are not assigned a specific IP address by your ISP.
Instructions for configuring NAT with DHCP Client mode begin on page 27.
Performing the Initial Configuration Page 15