SonicWALL Internet Security Appliances - Manual (Page 78)

General and Network Settings Page 79
Standard Configuration
If your ISP provided you with enough IP addresses for all the computers and network devices on your
LAN, enable Standard mode.
To configure Standard addressing mode, complete the following instructions:
1. Select Standard from the Network Addressing Mode menu. Because NAT is disabled, you must
assign valid IP addresses to all computers and network devices on your LAN.
2. Enter a unique, valid IP address from your LAN address range in the SonicWALL LAN IP Address
field. The SonicWALL LAN IP Address is the address assigned to the SonicWALL LAN and is used
for management of the SonicWALL.
3. Enter your network subnet mask in the LAN Subnet Mask field. The LAN Subnet Mask tells your
SonicWALL which IP addresses are on your LAN. The default value, "255.255.255.0", supports
up to 254 IP addresses.
4. Enter your WAN router or default gateway address in the WAN Gateway (Router) Address field.
Your router is the device that connects your network to the Internet. If you use Cable or DSL,
your WAN router is typically located at your ISP. If you use a router located at your site, use the
IP address assigned to it.
5. Enter your DNS server IP address(es) in the DNS Servers field. The SonicWALL uses the DNS
servers for diagnostic tests and for upgrade and registration functionality.
6. Click Update. Once the SonicWALL has been updated, a message confirming the update is
displayed at the bottom of the browser window. Restart the SonicWALL for these changes to
take effect.
NAT Enabled Configuration
Network Address Translation (NAT) connects your entire network to the Internet using a single IP
address. Network Address Translation offers the following:
•
Internet access to additional computers on the LAN. Multiple computers can access the Internet
even if your ISP only assigned one or two valid IP addresses to your network.
• Additional security and anonymity because your LAN IP addresses are invisible to the outside
world.
If your ISP hasn't provided enough IP addresses for all machines on your LAN, enable NAT and assign
your network a private IP address range. You should use addresses from one of the following
address ranges on your private network:
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
Tip If your network address range uses valid TCP/IP addresses, Internet sites within that range are
not accessible from the LAN. For example, if you assign the address range 199.2.23.1 -
199.2.23.255 to your LAN, a Web server on the Internet with the address of 199.2.23.20 is not
accessible.