ZyXEL Communications G-2000 Plus 28.5.4 Example 4: NAT Unfriendly Application Programs, One-to-One, No Overload, No Overload, Many-to-Many, Many-to-Many

				ZyAIR G-2000 Plus User’s Guide
	Figure 163 Example 3: Menu 15.2
		Menu 15.2 - 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:

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

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.

Chapter 28 Network Address Translation (NAT) 308