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4 Ports 11g Wireless ADSL2/2+ Router 90
4.4.5.4 Port Forwarding – Custom Port Forwarding
Custom Port Forwarding: If there is no pre-defined Port Forwarding Rule for a particular application, a user
rule can be created which defines the required Ports, Protocols and Port forwarding rules. Click the Custom
Port Forwarding button and the following screen will pop-up.
The Custom Port Forwarding screen allows you to create up to 20 custom port forwarding entries to support
specific services or applications; such as Concurrent NAT/NAPT operation.
To create a custom rule you will need to know the specific port number and port type that the application
requires. Some applications specify a range of ports in which case you will need to know both the starting and
ending port numbers in the range, which are mapped by the start port and end port fields.
The Port Map specifies the internal port that the data will be directed to on the LAN Client. When dealing with
port ranges, the Internal Port will be the same as the first port in the range. When you simply want to forward
a single port from outside to inside, then all three fields (Port Start, Port End and Port Map) will have the same
port number.
„ Connection: Select the WAN connection you are going to apply the custom Port Forwarding rule.
„ Enable: The Enable button is checked by default, meaning this rule is applied when you click on
the Apply button.
„ Application: Name of the application your port(s) will be opened for.
„ Protocol: There are three options available: TCP, UDP, and TCP and UDP.
„ Source IP Address: You can define the source IP address from which the incoming traffic will be
allowed. Enter “0.0.0.0” for all.
„ Source Netmask: Netmask of the source IP address. Enter “255.255.255.255” for all.