User manual

ZyWAN User Manual Configuring the ZyWAN

Button Explanation

Delete Row#

In order to delete a row in the table, enter a number in the

box between 1 and the highest number of rows. Then

click the Delete Row# button to delete the row. Once a

row is deleted, it cannot be restored without inserting a

row and entering the data again.

The screen offers the following fields:

Field Explanation

Inbound Interface

Enter the name of the network interface on which to

monitor the incoming connection to an IP port, such as

eth0 or ppp0. See

Understanding Interfaces on page 18

for a description of the available interfaces on the ZyWAN.

Inbound Port

Enter the port number of the incoming connection. Port

numbers should be a number between 1 and 65535.

Destination Address

Enter the numeric IP address to which the network traffic

is redirected. Each of the four fields must be a number

between 1 and 255.

Destination Port

Enter the destination port number to which the network

traffic is redirected. Port numbers should be a number

between 1 and 65535.

Enable NAT?

Select Yes if you wish to enable Network Address

Translation, also referred to as IP Masquerading. This

allows devices on one interface of the ZyWAN (‘internal’

side) to access the network on a second interface

(‘external’ side). The ZyWAN translates all IP traffic so that

it appears on the external side as a single IP address, but

on the internal side there may be multiple addresses

which are hidden from the external network (such as

multiple devices accessing the Internet through a firewall).

If Enable NAT is set to Yes, a Nat Table is available which looks like this: