ZyWAN User Manual
Configuring the ZyWAN
© 2008 Arcom Issue D
68
Field
Explanation
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.
Optional fields
:
The following optional fields configure the firewall to filter
allowed incoming connections to the ZyWAN.
Permitted Source Port
Range
Enter the range of source port numbers allowed for the
incoming connection. Normally source ports are randomly
assigned, so this field should only be used when the
source port is specified.
Permitted External
Network
Enter the numeric IP address, or range of addresses,
which is the source of the connection to the ZyWAN.
Each of the four fields must be a number between 0 and
255. For instance, entering an IP address network of
172.16.11.0 limits incoming connections from addresses
172.16.11.1 through 172.16.11.255.
Permitted MAC Address
Enter the MAC address, in hexadecimal format, of a
specific computer which is allowed to make a connection
to the configured Inbound Port.
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:
