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ZyWALL 2 Series User's Guide
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.
Rule 1.
Map the first IGA to the first inside FTP server for FTP traffic in both directions (1 : 1 mapping,
giving both local and global IP addresses).
Rule 2.
Map the second IGA to our second inside FTP server for FTP traffic in both directions (1 : 1
mapping, giving both local and global IP addresses).
Rule 3.
Map the other outgoing LAN traffic to IGA3 (Many : 1 mapping).
Rule 4.
You also map your third IGA to the web server and mail server on the LAN. Type Server allows
you to specify multiple servers, of different types, to other computers behind NAT on the LAN.
The example situation looks somewhat like this:
Step 1.
In this case you need to configure Address Mapping Set 1 from Menu 15.1 - Address Mapping
Sets. Therefore you must choose the Full Feature option from the Network Address
Translation field (in menu 4 or menu 11.3) in Figure 28-15.
Step 2.
Then enter 15 from the main menu.
Step 3.
Enter 1 to configure the Address Mapping Sets.
Step 4.
Enter 1 to begin configuring this new set. Enter a Set Name, choose the Edit Action and then
enter 1 for the Select Rule field. Press [ENTER] to confirm.
28-12
Figure 28-14 NAT Example 3
NAT
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