Ubee DDW3612 User Manual

Also see for DDW3612: Setup guide

Contents

Ubee DDW3612 User Manual Manual pdf 39 page image

Ubee Interactive 3.7 GatewayDDW3612 Subscriber User Guide • July, 2010 353.7.13 Additional Information - Port TriggeringSome services use a dedicated range of ports on the client side and a dedicatedrange of ports on the server side. With regular port forwarding you set a forwardingrule to forward a service to the IP address of a LAN side host. The problem is that portforwarding forwards a service to a single LAN IP address.With port triggering, we define 2 kinds of ports: Trigger Port and Target Port. Triggerport is defined as the service request with a specific destination port number sent froma LAN side host. Target Port is defined as the ports this specific application requires aLAN host to listen to. Thus, the server returns responses to these ports.Example:1. John requests a file from the Real Audio server (port 7070). Port 7070 is a “trigger”port and causes the wireless router to record John’s computer IP address. TheDDW3612 Wireless Cable Modem Gateway associates John's computer IPaddress with the "target" port range of 6970-7170.2. The Real Audio server responds to a port number ranging between 6970-7170.3. The DDW3612 Wireless Cable Modem Gateway forwards the traffic to John’scomputer IP address.4. Only John can connect to the Real Audio server until the connection is closed ortimes out.End Port Enter a port number or the ending port number in a range ofport numbers.Protocol Define the protocol type for this rule, UDP, TCP, or Both.Enable Click to activate this rule.Apply Click to save.