ZyXEL Communications ZyXEL ZyWALL 5 - Manual (Page 456)

ZyWALL 5 User’s Guide
Chapter 33 Network Address Translation (NAT) 455
33.4.2 Example 2: Internet Access with an Default Server
Figure 266 NAT Example 2
In this case, you do exactly as above (use the convenient pre-configured SUA Only set) and
also go to menu 15.2 to specify the Default Server behind the NAT as shown in the next
figure.
Figure 267 Menu 15.2: Specifying an Inside Server
33.4.3 Example 3: Multiple Public IP Addresses With Inside Servers
In this example, there are 3 IGAs from our ISP. There are many departments but two have
their own FTP server. All departments share the same router. The example will reserve one
IGA for each department with an FTP server and all departments use the other IGA. Map the
FTP servers to the first two IGAs and the other LAN traffic to the remaining IGA. Map the
third IGA to an inside web server and mail server. Four rules need to be configured, two bi-
directional and two uni-directional as follows.
Menu 15.2 - NAT Server Setup
Default Server: 192.168.1.10
Rule Act. Start Port End Port IP Address
------------------------------------------------------
001 Yes 21 25 192.168.1.33
002 No 0 0 0.0.0.0
003 No 0 0 0.0.0.0
004 No 0 0 0.0.0.0
005 No 0 0 0.0.0.0
006 No 0 0 0.0.0.0
007 No 0 0 0.0.0.0
008 No 0 0 0.0.0.0
009 No 0 0 0.0.0.0
010 No 0 0 0.0.0.0
Select Command= None Select Rule= N/A
Press ENTER to Confirm or ESC to Cancel: