User's Manual

UTT Technologies Chapter 8 NAT
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8.1.2 Port Forwarding Settings
Figure 8-1 Port Forwarding Settings
 Protocol: It specifies the transport protocol used by the service. The available
options are TCP, UDP and GRE.
 Start External Port: It specifies the lowest port number provided by the Device. The
external ports are opened for outside users to access.
 Internal IP Address: It specifies the IP address of the local host that provides the
service.
 Start Internal Port: It specifies the lowest port number of the service provided by the
LAN host. The Start External Port and Start Internal Port can be different.
 Port Count: It specifies the number of service ports provided by the LAN host. If the
service uses only one port number, enter 1. The maximum value is 20. For example,
if the start internal port is 21, the start 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: It specifies the NAT rule to which this port forwarding rule is bound. The port
forwarding rule will use the NAT rule¶s external IP address as its external IP address.
The available options are:
Ɣ Each EasyIP NAT rule¶s ID: it stands for the corresponding NAT rule respectively.
Ɣ WANx (x: 1, 2, 3, 4): It stands for the system reserved NAT rule bound to the
Internet connection on the selected WAN interface. The reserved NAT rule uses
the WAN interface¶s IP address as its external IP address.