ZyXEL Communications NBG410W3G - Manual (Page 77)

Chapter 4 Tutorials
NBG410W3G Series User’s Guide
77
Figure 34 H.323 Tutorial: SECURITY > Firewall > Rule Summary
That completes setup of your H.323 VoIP phone.
4.5 Using NAT with Multiple Public IP Addresses
This section shows you examples of how to set up your ZyXEL Device if you have more than
one fixed (static) IP address from your ISP.
4.5.1 Example Parameters and Scenario
The following table shows the public IP addresses from your ISP and your ZyXEL Device’s
LAN IP address.
The following figure shows the network you want to set up in this example.
• Assign the first public address (1.2.3.4) to the ZyXEL Device’s WAN 1 port.
• Map the second and third public IP addresses (1.2.3.5 and 1.2.3.6) to the web and mail
servers (192.168.1.12 and 192.168.1.13) respectively for traffic in both directions.
• Map the first public address (1.2.3.4) to outgoing traffic from other local computers.
• Map the first public address (1.2.3.4) to incoming traffic from WAN 1.
• Forward FTP traffic using port 21 from WAN 1 to a specific local computer
(192.168.1.39).
• The last public IP address (1.2.3.7) is not mapped to any device and is reserved for future
use.
Public IP Addresses 1.2.3.4 to 1.2.3.7
ZyXEL Device’s LAN IP Address 192.168.1.1