User Guide

Page 35 SonicWALL Internet Security Appliance User’s Guide
DNS Settings
• DNS Servers
DNS Servers, or Domain Name System Servers, are used by the SonicWALL for
diagnostic tests with the DNS Lookup Tool, and for upgrade and registration
functionality. DNS Server addresses should be assigned by your ISP.
If you select NAT with DHCP Client or NAT with PPPoE mode, the DNS Server
addresses is assigned automatically.
Note: The SonicWALL does not relay DNS settings to the LAN; you must enable and
configure the SonicWALL's DHCP server or manually configure your computer DNS
settings to obtain DNS name resolution.
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 port and is used for management of the SonicWALL.
3. Enter your network's 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 located at your ISP.
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.
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