ZyXEL Communications Prestige 662HW Series, User Manual

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Prestige 662HW Series User’s Guide
Network Address Translation (NAT) 31-15
Example 3: Menu 15.2.1
31.5.4 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 31-19 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-to-Many No Overload mapping types.
Menu 15.2.1 - NAT Server Setup
Rule Start Port No. End Port No. IP Address
---------------------------------------------------
1. Default Default 0.0.0.0
2. 80 80 192.168.1.21
3. 25 25 192.168.1.20
4. 0 0 0.0.0.0
5. 0 0 0.0.0.0
6. 0 0 0.0.0.0
7. 0 0 0.0.0.0
8. 0 0 0.0.0.0
9. 0 0 0.0.0.0
10. 0 0 0.0.0.0
11. 0 0 0.0.0.0
12. 0 0 0.0.0.0
Press ENTER to Confirm or ESC to Cancel: