Ubee DDW262.G User Manual

Contents

Ubee DDW262.G User Manual Manual pdf 46 page image

Using the Advanced Gateway Setup Port Triggering Option Ubee Interactive42 Ubee DDW262.G Wireless Cable Modem and Router Subscriber User Guide • September 20115.11 Using the Advanced Gateway Setup Port Triggering OptionThe Port Triggering option lets you assign dynamic triggers to specific devices on the LAN.When outgoing data is detected on an IP port set in the trigger range, the ports set in thetarget range are opened to accept incoming data. If no outgoing data is detected within tenminutes, the ports close. Therefore, port triggering does not keep the ports open all the timelike in port forwarding. This method is safer in that specific ports are opened only for specialapplications, such as interactive gaming and video conferencing.5.11.1 Understanding Port TriggeringSome services use a dedicated range of ports on the client side and a dedicated range ofports on the server side. Port forwarding sets a forwarding rule to send a service to the IPaddress of a LAN side host, and sends a service to a single LAN IP address.With port triggering, you can define two kinds of ports: a trigger port and a target port. Atrigger port is the service request with a specific destination port number sent from a LANside host. A target port is the port this specific application requires a LAN host to listen to.Therefore, the server returns responses to these ports.For example:1. John requests a file from the Real Audio server (port 7070). Port 7070 is a “trigger”port and causes the device to record John’s computer IP address. The DDW262.Gassociates John's computer IP address with the “target” port range of 6970-7170.2. The Real Audio server responds to a port number ranging between 6970-7170.3. The DDW262.G forwards the traffic to John’s computer IP address.Public Interface IP Designates another router on the network through which toforward data. Normally, this field is not modified.Ext. Start Port Defines the port number to start the range of ports to publish tothe Internet.Ext. End Port Defines the port number to end the range of ports published toInternet.Note: Be very careful with ranges. Ports within a range are notusable by other applications that may require them. It iscommon and safer to enter the same port number as the startand end of the range.Protocol Selects the protocol type, Options are UDP, TCPIP, or Both.Enabled Enables this rule when checked.Apply Saves all screen changes when clicked.Port Map Shows a list of common applications and their ports.