Figure 425 Nat Example 3 - ZyXEL Communications 5 Series User Manual

Chapter 44 Network Address Translation (NAT)
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).
3 Map the other outgoing LAN traffic to IGA3 (Many : 1 mapping).
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:

Figure 425 NAT Example 3

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
2 Then enter 15 from the main menu.
3 Enter 1 to configure the Address Mapping Sets.
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.
5 Select Type as One-to-One (direct mapping for packets going both ways), and enter
the local Start IP as 192.168.1.10 (the IP address of FTP Server 1), the global Start IP
as 10.132.50.1 (our first IGA). (See
6 Repeat the previous step for rules 2 to 4 as outlined above.
7 When finished, menu 15.1.1 should look like as shown in
686
Figure 426 on page
Figure 427 on page 687).
Figure 428 on page
ZyWALL 5/35/70 Series User's Guide
687.
688.