Additional Information - Port Triggering - Ubee ddw3611 User Manual

3.12 Advanced Gateway Setup - Port Triggering
Label
3.12.1
Some services use a dedicated range of ports on the client side and a dedicated
range of ports on the server side. With regular port forwarding you set a forwarding
rule to forward a service to the IP address of a LAN side host. The problem is that port
forwarding forwards a service to a single LAN IP address.
With port triggering, we define 2 kinds of ports: Trigger Port and Target Port. Trigger
port is defined as the service request with a specific destination port number sent from
a LAN side host. Target Port is defined as the ports this specific application requires a
LAN 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. The
DDW3611 Wireless Cable Modem Gateway 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 Wireless Cable Modem Gateway forwards the traffic to John's
computer IP address.
30
Trigger Range
Start Port
End Port
Target Range
Start Port
End Port
Protocol
Enable
Apply

Additional Information - Port Triggering

Description
The trigger port is a port (or a range of ports) that triggers the
router to record the IP address of the LAN computer that sent
the traffic to a server on the WAN.
Enter a port number or the starting port number in a range of
port numbers.
Enter a port number or the ending port number in a range of
port numbers.
Target Range is a port (or a range of ports) that a server on the
WAN uses when it responds to service requests. The router
forwards the traffic with this port (or range of ports) to the client
computer on the LAN that requested the service
Enter a port number or the starting port number in a range of
port numbers.
Enter a port number or the ending port number in a range of
port numbers.
Define the protocol type for this rule, UDP, TCP, or Both.
Click to activate this rule.
Click to save.
DDW3611 Subscriber User Guide • May, 2010
Ubee Interactive