UTT N518W Manual page 73

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external port is 2001 and the port count is 10, then the internal port range is from
21 to 30, and the external port range is from 2001 to 2010.
Bind to: Select the NAT rule to which this port forwarding rule is bound. The port
forwarding rule will use the WAN interface's IP address as the external IP
address.
Note: The system will automatically create some port forwarding rules. You
cannot modify or delete them.
7.1.1.3 Examples of Port Forwarding
7.1.1.3.1 Example One
An organization wants a LAN server (IP Address: 192.168.16.88) to open Syslog
service (Protocol: UDP; Port: 514) to the outside users. And the Device will use 2514
as the external port and the WAN1 IP address (200.200.200.88 in this example) as
the external IP address. Then all the requests for Syslog from outside users to
200.200.200.88:2514 will be forwarded to 192.168.16.88:514.
The following figure shows the detailed settings.
7.1.1.3.2 Example Two
An organization wants a LAN server (IP Address: 192.168.16.100) to open ftp service
(Protocol: TCP; Port: 20, 21) to the outside users. And the Device will use 2020 and
2021 as the external ports and the WAN2 IP address (200.200.201.18 in this example)
as the external IP address. As the ftp service uses two ports, so we need to set the
http://www.uttglobal.com
Figure 7-3 Port Forwarding settings - Example One
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