Example 4: Nat Unfriendly Application Programs - ZyXEL Communications Prestige 310 User Manual

Prestige 310 Broadband Sharing Gateway

6.5.4 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-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 6-21 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 to configure these two menus as follows.
Network Address Translation (NAT) 6-21