User`s manual

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Enabled: Enable the Virtual Server option.
Private IP: This is the LAN client/host IP address that the Public Port number packet will be sent to.
Private Port: This is the port number (of the above Private IP host) that the below Public Port number will
be changed to when the packet enters your LAN (to the LAN Server/Client IP)
Type: Select the port number protocol type (TCP, UDP or both). If you are unsure, then leave it to the
default both protocols.
Public Port: Enter the service (service/Internet application) port number from the Internet that will be
re-directed to the above Private IP address host in your LAN.
Comment: The description of this setting.
3.6.2 Port Triggering
Some applications require multiple connections, such as Internet gaming, video conferencing, Internet
telephony and others. These applications cannot work when Network Address Translation (NAT) is
enabled. If you need to run applications that require multiple connections,-specify the port normally
associated with an application in the "Trigger Port" field, select the protocol type as TCP or UDP, then
enter the public ports associated with the trigger port to open them for inbound traffic.