Other Settings; Nat (Network Address Translation) And Port Forwarding Settings - AirTies RT-205 User Manual

Other Settings

6.
NAT (Network Address Translation) and
6.1
Port Forwarding Settings
Network Address Translation (NAT) is a way to map an entire network (or networks) to a single
IP address. NAT allows multiple users in your local network to access the Internet through a
single public IP address (the global or legal IP address) assigned to you by your Internet service
provider. While your WAV-140 bears the global IP address, local IP addresses (like 192.168.2.4)
are assigned to hosts on your local network.
For a host outside your local network to access a machine on your local network, "Port Forwarding"
is used. Data packets sent from the Internet to your global IP address arrive at a certain port of
your modem. If Port Forwarding is defined for that port, the incoming traffic is redirected to a
machine inside the local network that has only a local IP address. Some popular peer-to-peer
applications (e.g. E-mule, Kazaa, VPN, Remote desktop) rely on this technology.
To enable Port Forwarding on a port, go to "NAT" menu on the left menu bar and click on "Port
Forwarding".
In the window titled "Port Routing", you can either find and select the client machine from the
list of machines on the local network and the application from the "Current Applications" list, or
you can enter a new application, and related forwarding information.
In the window titled "Port Routing":
In the "Application" field, assign a name for the Port Forwarding rule you are creating.
Enter the local IP address of the client that is to be accessible from the Internet in the "Target
IP Address" field.
Select the protocol that the application uses from the list of protocols in the "Protocol" box. If
you are unsure of the protocol, select "TCP&UDP".
Enter the real port number used by the application in the "Wan Ports" field.
Enter the local port number for the application in the "Target LAN Ports" field. (can be the same
as the Real Port)
To forward a range of ports instead of a single port, use a dash (-) sign in between. For example
to forward all ports between 23 and 80, enter "23-80".
Check the "Enable" box.
Click "Save".
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