42 CHAPTER 3: QUICK SETUP FOR THE F IREWALLTo configure the WAN networking of your Firewall enter the following1 In the Firewall WAN IP Address field enter the single address which hasbeen allocated to your Firewall. Enter the subnet mask for the above IPaddress in the WAN/DMZ Subnet Mask field.2 In the WAN Gateway (Router) Address field enter the address of yourinternet access device. This may be a router, LAN modem or other deviceand must be in the same subnet as the WAN IP address of the Firewall.3 Enter any DNS servers external to your network in the order that youwant them to be accessed. The second server will only be accessed if thefirst is unavailable or is unable to answer your query.4 Click the Next button to proceed to the final part of the configuration.See “Configuring LAN Settings” on page 44.Using Multiple StaticIP AddressesSelect the Assigned you two or more IP addresses option and click theNext button. The Network Address Translation screen will be displayed asshown in Figure 13 below.Figure 13 Choosing whether to activate NAT for multiple addressesYou are given a choice of: Don’t use NAT — This will disable Network Address Translation,limiting you to the same number of IP devices as you have addresses. Use NAT — This will enable Network Address Translation allowing youto use as many IP devices as you wish on the LAN port. The remainingpublic IP addresses can be allocated to devices on the DMZ port.DUA1611-0AAA02.book Page 42 Thursday, August 2, 2001 4:01 PM
