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ZyXEL LTE3316 Series Manual

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Chapter 9 Network Address Translation (NAT)
LTE Series User’s Guide
122
Note: To configure port forwarding, you need to have the same configurations in the Start
Port, End Port, Translation Start Port, and Translation End Port fields.
To configure port translation, you need to have different configurations in the Start Port,
End Port, Translation Start Port, and Translation End Port fields.
Note: TCP port 7547 is reserved for system use.
The following table describes the labels in this screen.
9.3 Port Triggering
Some services use a dedicated range of ports on the client side and a dedicated range of ports on the
server side. With regular port forwarding, you set a forwarding port in NAT to forward a service (coming
in from the server on the WAN) to the IP address of a computer on the client side (LAN). The problem is
that port forwarding only forwards a service to a single LAN IP address. In order to use the same service
on a different LAN computer, you have to manually replace the LAN computer's IP address in the
forwarding port with another LAN computer's IP address.
Table 45 Port Forwarding: Add/Edit
LABEL DESCRIPTION
Active Select or clear this field to turn the port forwarding rule on or off.
Service Name Select a service to forward or select User Defined and enter a name in the field to the right.
WAN Interface Select the WAN interface for which to configure NAT port forwarding rules.
Start Port Configure this for a user-defined entry. Enter the original destination port for the packets.
To forward only one port, enter the port number again in the End Port field.
To forward a series of ports, enter the start port number here and the end port number in the
End Port field.
End Port Configure this for a user-defined entry. Enter the last port of the original destination port range.
To forward only one port, enter the port number in the Start Port field above and then enter it
again in this field.
To forward a series of ports, enter the last port number in a series that begins with the port
number in the Start Port field above.
Translation Start
Port
Configure this for a user-defined entry. This shows the port number to which you want the Zyxel
Device to translate the incoming port. For a range of ports, enter the first number of the range
to which you want the incoming ports translated.
Translation End
Port
Configure this for a user-defined entry. This shows the last port of the translated port range.
Server IP Address Enter the inside IP address of the virtual server here.
Configure
Originating IP
Click the Enable check box to enter the originating IP in the next field.
Originating IP Enter the originating IP address here.
Protocol
Select the protocol supported by this virtual server. Choices are TCP, UDP, or TCP/UDP.
OK Click this to save your changes.
Cancel Click this to exit this screen without saving.
… 122 …


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