Ubee Interactive Using the Port Triggering Option
Ubee DDW3611 Wireless Cable Modem Gateway Subscriber User Guide • November 2012 51
3. Click to close the Port Map window.
5.12 Using the Port Triggering Option
Port Triggering assigns dynamic triggers to specific devices on the LAN. Special
applications requiring specific port numbers with bi-directional traffic can then function
properly. Applications such as video conferencing, gaming, and some messaging program
features may require these special settings.
Some services use a dedicated range of ports on the client and server sides. With port
forwarding, you define a rule to send a service to the IP address of a LAN side host. Port
forwarding sends a service to a single LAN IP address.
Port triggering defines two kinds of ports and the server returns responses to these ports:
Trigger port – A service request with a specific destination port number sent from
a LAN side host.
Target Port – A port this specific application requires a LAN host to listen to.
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 IP address. The DDW3611 associates
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 DDW3611 forwards the traffic to John’s IP address.
To Next Page
Loading...
Need help?
General
