Port Forwarding - LevelOne WGR-2301 User Manual

to the Intranet server through the device, at this point, the static NAT mapping or virtual server
(DMZ host) needs to be set up on the device in order to achieve this objective.
With the static NAT mapping function, a one-to-one mapping relationship can be established
between<External IP address + External port>and<Internal IP address + Internal port>, so that
all the service requests for a specified port of the device will be forwarded to the matching intranet
server, and the computer in the external network can access to the services provided by this server.
In some cases, a network computer needs to be fully exposed to the Internet, in order to achieve
two-way communications, and at this time, you will need to set up this computer to a virtual
server (DMZ host). When an external user accesses to the public network address that is mapped
to the virtual server, the device will forward the packets directly to the virtual server.
Tip: The computer that is set to a virtual server will lose the firewall protection of the device.
The priority of NAT static mappings is higher than the virtual server. When the device receives a
request from an external network, it will first check to see if there is a matching NAT static
mapping based on the IP address and port number of the external access requests, and send the
request messages matching the static NAT mapping to the Intranet computers if any. If there are no
matching static mappings, it will check to see if there is a matching virtual server.
3. Two types of NAT rules
The device provides two NAT types: "Easy IP" and "One2One".
Easy IP: The translation of network port addresses. Multiple internal IP addresses are mapped to
the same external IP address. It can dynamically assign a port associated with a single external
address for each internal connection, and maintain the mapping of these internal connections to an
external port, thus enabling multiple users to use a public network address to communicate with
the external Internet.
One2One: The translation of static addresses. The internal IP and the external IP address are
subject to one-to-one mapping. In this mode, the port number will not change. It is typically
used to configure the extranet-access-to-intranet server: The network servers still use private
addresses, and provide the public IP address assigned to it to the external network users.
We refer to each specific NAT configuration as "NAT rules". The exit IP address and lines must be
specified when configuring the NAT rules. When there are multiple valid public network
addresses, each type of NAT rules can be configured with more than one. In practical application,
a mixture of different types of NAT rules often needs to be used.

8.1.2 Port Forwarding

This section describes the static NAT mapping functions of the device. Below is the description of
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Chapter 8 Wireless configuration
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