107Nortel Business Secure Router 222 Configuration — AdvancedChapter 9Network Address Translation (NAT)This chapter discusses how to configure NAT on the Business Secure Router.Using NATSUA (Single User Account) Versus NATSUA (Single User Account) is an implementation of a subset of NAT thatsupports two types of mapping, Many-to-One and Server. For a detaileddescription of NAT set for SUA, see“Address Mapping Sets” on page 110. TheBusiness Secure Router also supports Full Feature NAT to map multiple globalIP addresses to multiple private LAN IP addresses of clients or servers usingmapping types.Applying NATYou apply NAT via menus 4 or 11.1.2 (Figure 39 on page 109). Figure 38 showsyou how to apply NAT for Internet access in menu 4. Enter 4 from the main menuto go to Menu 4 - Internet Access Setup.Note: You must create a firewall rule in addition to setting up SUA/NAT, to allow traffic from the WAN to be forwarded through theBusiness Secure Router.Note: Choose SUA Only if you have just one public WAN IP addressfor your Business Secure Router.Choose Full Feature if you have multiple public WAN IP addresses foryour Business Secure Router.
