Chapter 36 Network Address Translation (NAT)

36.4.4 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-One-to-Onemapping as port numbers do not change for Many-One-to-One(and One-to-One)NAT mapping types. The following figure illustrates this.

Figure 361 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-One and Many- One-to-One mapping types.

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

Figure 362 Example 4: Menu 15.1.1.1: Address Mapping Rule

Menu 15.1.1.1 Address Mapping Rule

Type= Many-One-to-One

Local IP:

Start= 192.168.1.10

End = 192.168.1.12

Global IP:

Start= 10.132.50.1

End = 10.132.50.3

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.

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