Example 4: Nat Unfriendly Application Programs; Figure 334 Nat Example 4; Figure 335 Example 4: Menu 15.1.1.1: Address Mapping Rule - ZyXEL Communications 35 Series User Manual

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

Figure 334 NAT Example 4

Note: 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 335 Example 4: Menu 15.1.1.1: Address Mapping Rule

After you've configured your rule, you should be able to check the settings in menu 15.1.1 as
shown next.
Chapter 42 Network Address Translation (NAT)
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:
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