ZyXEL Communications ZyXEL ZyWALL 2WE User Manual page 18

ZyWALL 2 and ZyWALL 2WE
Figure 12-1 How NAT Works .......................................................................................................................12-3
Figure 12-2 NAT Application With IP Alias .................................................................................................12-4
Figure 12-3 Menu 4: Applying NAT for Internet Access..............................................................................12-7
Figure 12-4 Menu 11.3: Applying NAT to the Remote Node .......................................................................12-8
Figure 12-5 Menu 15: NAT Setup ................................................................................................................12-9
Figure 12-6 Menu 15.1: Address Mapping Sets ...........................................................................................12-9
Figure 12-7 Menu 15.1.255: SUA Address Mapping Rules .......................................................................12-10
Figure 12-8 Menu 15.1.1: First Set.............................................................................................................12-11
Figure 12-9 Menu 15.1.1.1: Editing/Configuring an Individual Rule in a Set............................................12-13
Figure 12-10 Menu 15.2: NAT Server Setup ..............................................................................................12-16
Figure 12-11 Multiple Servers Behind NAT Example................................................................................12-16
Figure 12-12 NAT Example 1.....................................................................................................................12-17
Figure 12-13 Menu 4: Internet Access & NAT Example ............................................................................12-17
Figure 12-14 NAT Example 2.....................................................................................................................12-18
Figure 12-15 Menu 15.2: Specifying an Inside Server ...............................................................................12-19
Figure 12-16 NAT Example 3.....................................................................................................................12-20
Figure 12-17 Example 3: Menu 11.3 ..........................................................................................................12-21
Figure 12-18 Example 3: Menu 15.1.1.1 ....................................................................................................12-21
Figure 12-19 Example 3: Final Menu 15.1.1 ..............................................................................................12-22
Figure 12-20 Example 3: Menu 15.2 ..........................................................................................................12-22
Figure 12-21 NAT Example 4.....................................................................................................................12-23
Figure 12-22 Example 4: Menu 15.1.1.1: Address Mapping Rule .............................................................12-24
Figure 12-23 Example 4: Menu 15.1.1: Address Mapping Rules...............................................................12-24
Figure 12-24 Trigger Port Forwarding Process: Example ..........................................................................12-25
Figure 12-25 Menu 15.3-Trigger Port Setup............................................................................................12-26
Figure 13-1 ZyWALL Firewall Application .................................................................................................13-3
Figure 13-2 Three-Way Handshake ..............................................................................................................13-5
xviii List of Figures