11-28 Administration GuideMultiNAT Configuration ExampleTo help you understand a typical MultiNAT configuration, this section describes an example of the type ofconfiguration you may want to implement on your site. The values shown are for example purposes only. Makeyour own appropriate substitutions.A typical DSL service from an ISP might include five user addresses. Without PAT, you might be able to attachonly five IP hosts. Using simple 1-to-many PAT you can connect more than five devices, but use only one of youraddresses. Using multiNAT you can make full use of the address range. The example assumes the followingrange of addresses offered by a typical ISP:Public IP addresses assigned by the ISP are 206.1.1.1 through 206.1.1.6 (255.255.255.248 subnet mask).Your internal devices have IP addresses of 192.168.1.1 through 192.168.1.254 (255.255.255.0 subnetmask).In this example you will statically map the first five public IP addresses (206.1.1.1 - 206.1.1.5) to the first fivecorresponding private IP addresses (192.168.1.1 - 192.168.1.5). You will use these 1-to-1 mapped addressesto give your servers “real” addresses. You will then map 206.1.1.6 to the remaining private IP addresses(192.168.1.6 - 192.168.1.254) using PAT.The configuration process is as follows:From the Main Menu go to the Easy Setup and then the Connection Profile screen.Local WAN IP address: 206.1.1.6Local WAN subnet mask: 255.255.255.248Remote IP address: 206.1.1.254Default gateway: 206.1.1.254Netopia Router's address is: 192.168.1.1Web server's address is: 192.168.1.253Mail server's address is: 192.168.1.254FTP server's address is: 192.168.1.253MainMenuEasySetupConnectionProfile
