ZyXEL Communications 5 Series - Manual (Page 624)

ZyWALL 5/35/70 Series User’s Guide
624 Chapter 42 Network Address Translation (NAT)
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).
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 370 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
Figure 371 on page 625 .
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
Figure 372 on page 625 ).
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 Figure 373 on page 626 .