ZyXEL Communications P-334W 28.5.4 Example 4: NAT Unfriendly Application Programs, One-to-One, No Overload, No Overload, Many-to-Many, Many-to-Many, Example 3: Menu

Prestige 334W User’s Guide

Menu	15.2 - NAT	Server Setup
Rule Start Port No.	End Port	No. IP Address

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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:

HTTP:80 FTP:21 Telnet:23 SMTP:25 POP3:110 PPTP:1723

Example 3: Menu 15.2

28.5.4 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 28-18 NAT Example 4

28-16 NAT