Figure 30-13 Menu 15.2: Specifying An Inside Server - ZyXEL Communications ZyWALL 5 User Manual

30.4.3 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.
Map the first IGA to the first inside FTP server for FTP traffic in both directions (1 : 1
Rule 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 :
Rule 2.
1 mapping, giving both local and global IP addresses).
Map the other outgoing LAN traffic to IGA3 (Many : 1 mapping).
Rule 3.
You also map your third IGA to the web server and mail server on the LAN. Type Server
Rule 4.
allows you to specify multiple servers, of different types, to other computers behind NAT
on the LAN.
The example situation looks somewhat like this:
NAT
Menu 15.2 - NAT Server Setup
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:

Figure 30-13 Menu 15.2: Specifying an Inside Server

ZyWALL 5 Internet Security Appliance
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
30-9