Example 2: Internet Access With A Default Server; Example 3: Multiple Public Ip Addresses With Inside Servers; Figure 251 Nat Example 2; Figure 252 Menu 15.2: Specifying An Inside Server - ZyXEL Communications ZyWALL 2Plus User Manual

ZyWALL 2 Plus User's Guide

30.4.2 Example 2: Internet Access with a Default Server

Figure 251 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 252 Menu 15.2: Specifying an Inside Server

30.4.3 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.
426
Menu 15.2 - NAT Server Setup
Default Server: 192.168.1.10
Rule Act. Start Port
------------------------------------------------------
001 No 0
002 Yes 21
003 No 0
004 No 0
005 No 0
006 No 0
007 No 0
008 No 0
009 No 0
010 No 0
Select Command= None
Press ENTER to Confirm or ESC to Cancel:
End Port IP Address
0 0.0.0.0
25 192.168.1.33
0 0.0.0.0
0 0.0.0.0
0 0.0.0.0
0 0.0.0.0
0 0.0.0.0
0 0.0.0.0
0 0.0.0.0
0 0.0.0.0
Select Rule= N/A
Chapter 30 Network Address Translation (NAT)