Example 3: Multiple Public Ip Addresses With Inside Servers; Figure 194 Nat Example 2; Figure 195 Menu 15.2.1 Specifying An Inside Server - ZyXEL Communications Prestige 662H Series User Manual

Figure 194 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 Inside Server behind the NAT as shown in the next figure.

Figure 195 Menu 15.2.1 Specifying an Inside Server

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34.5.3 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 unidirectional as follows.
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).
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).
Map the other outgoing LAN traffic to IGA3 (Many : 1 mapping).
Chapter 34 Network Address Translation (NAT)
Menu 15.2.1 - NAT Server Setup (Used for SUA Only)
Rule Start Port No.
1. Default
2. 0
3. 0
4. 0
5. 0
6. 0
7. 0
8. 0
9. 0
10. 0
11. 0
12. 0
Press ENTER to Confirm or ESC to Cancel:
Prestige 662H/HW Series User's Guide
End Port No. IP Address
Default 192.168.1.10
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
0 0.0.0.0
0 0.0.0.0
0 0.0.0.0
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