User's Manual

UTT Technologies Chapter 8 NAT
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as its external IP address. It allows you bind multiple port forwarding rules to the same
EasyIP NAT rule.
Ɣ Only after you have configured an Internet connection, you can create a NAT rule which
is bound to this Internet connection; and only after you have configured an EasyIP NAT
rule, you can create a port forwarding rule which is bound to this EasyIP NAT rule.
8.3.1.4 System Reserved NAT Rules
After you have finished configuring the WAN1 Internet connection through the Quick
Wizard, or configuring the WAN1 Internet connection and other connections in the Basic >
WAN page, the Device will automatically create a NAT rule for each Internet connection
respectively.
For convenience, we call them system reserved NAT rules in the manual. You can view them in
the
NAT Rule List. By default, a system reserved NAT rule¶s Type is EasyIP, Bind to is the
WAN interface on which the Internet connection is established, external IP Address is 0.0.0.0
which means this NAT rule will directly use the WAN interface¶s IP address as its external IP
address.
8.3.2 NAT and Multi-WAN Load Balancing
8.3.2.1 Overview
The section 6.3 Load Balancing describes load balancing among multiple Internet
connections. In actual, that feature implementation is based on NAT feature.
8.3.2.2 Assigning Preferential Channel according to Source IP
Here, the channel stands for the NAT rule, which determines NAT type, external IP
address and Internet connection used by the LAN hosts to surf the Internet.
On the Device, you can assign a preferential channel to some LAN hosts in advance by
specifying the NAT rule¶s Start Internal IP Address and End Internal IP Address, then
the LAN hosts belong to the specified address range will preferentially use the assigned
NAT rule to access the Internet. If the assigned NAT rule is in effect, these LAN hosts can
only use this NAT rule to access the Internet. Else, the Device will take them as the free