ZyXEL Communications Prestige 650H-17, User Manual, Page: 107 / 200

Prestige 650H-17 ADSL Router
NAT 7-19
Figure 7-16 Menu 15.2.1 – Specifying an Inside Server
7.5.3 Example 3: Multiple Public IP Addresses With Inside Servers
In this example, there are three 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.
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:
Menu 15.2.1 - NAT Server Setup (Used for SUA Only)
Rule Start Port No. End Port No. IP Address
---------------------------------------------------
1. Default Default 192.168.1.10
2. 0 0 0.0.0.0
3. 0 0 0.0.0.0
4. 0 0 0.0.0.0
5. 0 0 0.0.0.0
6. 0 0 0.0.0.0
7. 0 0 0.0.0.0
8. 0 0 0.0.0.0
9. 0 0 0.0.0.0
10. 0 0 0.0.0.0
11. 0 0 0.0.0.0
12. 0 0 0.0.0.0
Press ENTER to Confirm or ESC to Cancel: