Example 3: Multiple Public Ip Addresses With Inside Servers; Figure 391 Menu 15.2.1: Specifying An Inside Server - ZyXEL Communications ZyXEL ZyWALL 2WG User Manual

Figure 391 Menu 15.2.1: Specifying an Inside Server

38.4.3 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.
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:
ZyWALL 2WG User's Guide
Menu 15.2.1 - 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:
Chapter 38 Network Address Translation (NAT)
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
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