Example 4: Nat Unfriendly Application Programs - ZyXEL Communications P-792H User Manual

Chapter 30 NAT Setup
(Enter 1 or 2 from menu 15.2 on a P-792H v2 with multiple WAN ports) configure
3
the menu as shown in
Figure 169 Example 3: Menu 15.2

30.4.4 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 170 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.
334
Figure 169 on page
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
334.
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
P-792H v2 User's Guide