Ubee Interactive Using the Advanced Option
Ubee EVW32C Advanced Wireless Voice Gateway Subscriber User Manual • March 2017 61
6.4.7 Using the Port Triggering Option
Port Triggering defines dynamic triggers for specific devices on the LAN. This allows
special applications that require specific port numbers with bi-directional traffic to function
properly. Applications such as video conferencing, voice, gaming, and some messaging
program features may require these special settings.
Some services use a dedicated range of ports on the client side and a dedicated range of
ports on the server side. The difference between port forwarding and triggering is:
Port forwarding sets a rule to send a service to a single LAN IP address.
Port triggering defines two kinds of ports: trigger port and target port. The trigger
port sends a service request from a LAN host to a specific destination port number.
The port the LAN host is required to listen to by the application is called the target
port. 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 EVW32C
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.
Label Description
Start Port Defines the starting port number
End Port Defines the ending port number.
Protocol Selects the protocol type. Options are UDP, TCP, or Both.
Enabled Activates the rule and filters out all traffic on the specified ports.
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