Dell SonicWALL GX250 Manual page 106

To configure One-to-One NAT, complete the following instructions.
1. Check the Enable One-to-One NAT checkbox.
2. Enter the beginning IP address of the private address range being mapped in the
Private Range Begin field. This is the IP address of the first machine that is ac-
cessible from the Internet.
3. Enter the beginning IP address of the valid address range being mapped in the
Public Range Begin field. This address should be assigned by your ISP.
Note: Do not include the SonicWALL WAN IP (NAT Public) Address or the WAN
Gateway (Router) Address in this range.
4. Enter the number of public IP addresses that should be mapped to private address-
es in the Range Length field. The range length may not exceed the number of
valid IP addresses. Up to 64 ranges may be added. To map a single address, enter
a Range Length of 1.
5. 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 changes to take effect.
Note: The One-to-One NAT window maps valid, public IP addresses to private LAN
IP addresses. It does not allow traffic from the Internet to the private LAN
A rule must be created in the Rules section to allow access to LAN servers. Once One-
to-One NAT has been configured, create an Allow rule to permit traffic from the
Internet to the private IP address(es) on the LAN.
Page 106 ADVANCED FEATURES
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