P-660H/HW/W-T Series User’ Guide

27.5.4 Example 4: NAT Unfriendly Application Programs

Some applications do not support NAT Mapping using TCP or UDP port address translation. In this case it is better to use Many-to-Many No Overload mapping as port numbers do not change for Many-to-Many No Overload (and One-to-One)NAT mapping types. The following figure illustrates this.

Figure 160 NAT Example 4

Other applications such as some gaming programs are NAT unfriendly because they embed addressing information in the data stream. These applications won’t work through NAT even when using One-to-Oneand Many-to-Many No Overload mapping types.

Follow the steps outlined in example 3 to configure these two menus as follows.

Figure 161 Example 4: Menu 15.1.1.1 Address Mapping Rule

Menu 15.1.1.1 Address Mapping Rule

Type= Many-to-Many No Overload

Local IP:

Start= 192.168.1.10

End = 192.168.1.12

Global IP:

Start= 10.132.50.1

End = 10.132.50.3

Server Mapping Set= N/A

Press ENTER to Confirm or ESC to Cancel:

After you’ve configured your rule, you should be able to check the settings in menu 15.1.1 as shown next.

267

Chapter 27 Network Address Translation (NAT)