Prestige 314 PLUS Broadband Sharing Gateway with 4-Port Switch

Step 8. Now enter 2 from this menu and configure it as shown in Figure 4-21.

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.

1026

1026

 

RR Reserved

Press ENTER to Confirm or ESC to Cancel:

Figure 4-21 Example 3: Menu 15.2

4.4.4 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-Onemapping as port numbers do not change for this mapping type. The following figure illustrates this.

4-24

NAT