Example 4: Nat Unfriendly Application Programs - ZyXEL Communications P-334W User Manual

Prestige 334W User's Guide

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.
28-16
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
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
Figure 28-18 NAT Example 4
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
NAT