Figure 175 Example 3: Menu 15.2
28.4.4 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 176 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.
Chapter 28 NAT Setup
Menu 15.2 - NAT Server Setup
Rule
Start Port No.
---------------------------------------------------
1.
Default
2.
80
3.
25
4.
0
5.
0
6.
0
7.
0
8.
0
9.
0
10.
0
11.
0
12.
0
End Port No.
IP Address
Default
0.0.0.0
80
192.168.1.21
25
192.168.1.20
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
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