P312 Broadband Security Gateway

remote node basis. They are reusable, but only one set is allowed for each remote node. The Prestige supports 2 sets since there is only one remote node. The second set (SUA Only option in Menu 15.1) is a convenient, pre-configured, read only Many-to-1 port mapping set, sufficient for most purposes (see section

6.4for some examples) and helpful to people already familiar with SUA in previous ZyNOS versions.

6.1.6 NAT Application

The following figure illustrates a possible NAT application, where three inside LANs (logical LANs using IP Alias) behind the Prestige can “talk” to three distinct Internet destinations. More examples follow at the end of this chapter.

Figure 6-2 NAT Application

6.2SMT Menus

6.2.1 Applying NAT in the SMT Menus

You apply NAT via menus 4 or 11.3 as displayed next. The next figure how you apply NAT for Internet access in Menu 4. Enter 4 from the Main Menu to go to Menu 4 - Internet Access Setup.

6-4

NAT

Page 77
Image 77
ZyXEL Communications P-312 manual NAT Application, Applying NAT in the SMT Menus