Dell SonicWALL GX250 Manual page 41

1. Select NAT Enabled from the Network Addressing Mode menu in the
Network window.
2. Enter a unique 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's 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 the SonicWALL which IP addresses are on your LAN. Use the default val-
ue, "255.255.255.0", if there are less than 254 computers on your LAN. Use the
Add LAN Subnet feature if you have multiple subnets on your network.
4. Enter your WAN router or default gateway address in the WAN Gateway (Rout-
er) Address field. This is the device that connects your network to the Internet.
If you use Cable or DSL, your WAN router is probably located at your ISP.
5. Enter a valid IP address assigned by your ISP in the SonicWALL WAN IP (NAT
Public) Address field. Because NAT is enabled, all network activity appears to
originate from this address.
6. Enter your WAN subnet mask in the WAN/DMZ Subnet Mask field. This subnet
mask should be assigned by your ISP.
7. Enter your DNS server IP address(es) in the DNS Servers field. The SonicWALL
uses these DNS servers for diagnostic tests and for upgrade and registration func-
tionality.
SonicWALL Internet Security Appliance Guide Page 41