Additional Information - Forwarding; Advanced Gateway Setup - Port Triggering - Ubee ddw3611 User Manual

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3.11.1
Internal Ports are the ports that local servers listen to. External Ports are the ports that
the cable modem listens to. For example, a local user on your network (e.g. John) is
running a Telnet Daemon on port 64623; the internal port is 64623, the external port is
23. If an internet user initializes a Telnet connection request to this router's public IP
address, the router recognizes that this is a Telnet connection request to a station.
According to existing forwarding rules, the router first translates the packet's
destination port to be 64623, and then forward this request to John's Telnet host.
In summary, when you have port forwarding rules set up, your router takes the data off
of the external IP address:port number and sends that data to an internal
IP address:port number. Port Forwarding rules are created per port. So a rule set up
for port 53 will only work for port 53. A port can only be used by one program at a
time.
3.12

Advanced Gateway Setup - Port Triggering

The Port Triggering option allows you to configure dynamic triggers to specific devices
on the LAN. This allows for 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. Refer to
1. Access the web interface. Refer to
2. Click the Gateway link from the top of the screen.
3. Click Port Triggering from the left side of the screen. The Port Triggering fields
are explained following this screen example.
DDW3611 Subscriber User Guide • May, 2010

Additional Information - Forwarding

page 30 for more information on how to setup Port Triggering.
3.12 Advanced Gateway Setup - Port Triggering
page 7, if needed.
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