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Page 36 / 70 Scroll up to view Page 31 - 35
3.7
Gateway
Ubee Interactive
32
DDW3612 Subscriber User Guide
•
July, 2010
Setup Port Forwarding (XBOX example):
To setup Port Forwarding, use the following procedure:
1.
Access the web interface. Refer to
page 7
, if needed.
2.
Click the
Gateway
link from the top of the screen. Click
Forwarding
from the left
side of the screen. The
Forwarding
fields are explained following this screen
example.
3. The example below shows how to setup an XBOX running Modern Warfare 2.
Since multiple ports are used for XBOX and this particular game, a separate
forwarding rule is setup for each port. Multiple ports and forwarding rules may not
be the case for other applications, however. Note the following:
The
XBOX IP
is entered in the Local IP field. Notice how the IP is entered in 4
rows, one row for each port used by the XBOX.
The
ports
used by the XBOX are defined in the Internal Port field. The same
ports used by the XBOX are also defined in the External Port Start and End
fields.
Keep in mind that you may want to setup some applications/services to listen
on one internal port, while external internet users who want to access that
application address it using another port, such as an Audio server. Using the
screen example below,
Internal Ports
are the ports that local servers listen to.
External Ports
are the ports that the cable modem listens to from the WAN.
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.
For detailed information on port forwarding, including how to set it up for
specific applications using specific network devices (for example, cable
modems), refer to:
http://portforward.com
or consult your host device or
application user manual.
Page 37 / 70
Ubee Interactive
3.7
Gateway
DDW3612 Subscriber User Guide
•
July, 2010
33
Label
Description
Index
Displays the Index number of the rule.
Local IP
Enter the last digits of the IP address of the server for which to
setup the forwarding rule.
Internal Port
Enter the port number listened to by the server host located in
your LAN.
Public Interface IP
Normally, this field is not modified unless you wish to designate
another router on the network to forward data through.
Ext. Start Port
Define the port number to start the range of ports to publish to
the Internet.
Ext. End Port
Define the port number to end the range of ports published to
Internet.
Note: Be very careful with ranges. Ports within a range will not
be usable by other applications that may require them. It is
common and safer to enter the same port number as the start
and end of the range.
Protocol
Select the protocol type, UDP, TCPIP, or Both.
Enabled
Select to enable this rule.
Apply
Click to save.
Port Map
Click to show a list of common applications and their ports.
Page 38 / 70
3.7
Gateway
Ubee Interactive
34
DDW3612 Subscriber User Guide
•
July, 2010
3.7.12
Gateway - 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
page 35
for more information on how to setup Port Triggering.
1.
Access the web interface. Refer to
page 7
, if needed.
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.
Label
Description
Trigger Range
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.
Start Port
Enter a port number or the starting port number in a range of
port numbers.
End Port
Enter a port number or the ending port number in a range of
port numbers.
Target Range
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
Start Port
Enter a port number or the starting port number in a range of
port numbers.
Page 39 / 70
Ubee Interactive
3.7
Gateway
DDW3612 Subscriber User Guide
•
July, 2010
35
3.7.13
Additional Information - Port Triggering
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
DDW3612 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 DDW3612 Wireless Cable Modem Gateway forwards the traffic to John’s
computer IP address.
4. Only John can connect to the Real Audio server until the connection is closed or
times out.
End Port
Enter a port number or the ending port number in a range of
port numbers.
Protocol
Define the protocol type for this rule, UDP, TCP, or Both.
Enable
Click to activate this rule.
Apply
Click to save.
Page 40 / 70
3.7
Gateway
Ubee Interactive
36
DDW3612 Subscriber User Guide
•
July, 2010
3.7.14
Gateway - Pass Through
The
Pass Through
option allows you to configure a pass through table. Devices in
the pass through table are treated as bridge devices, storing and forwarding data
between LAN interconnections.
1.
Access the web interface. Refer to
page 7
, if needed.
2. Click the
Gateway
link from the top of the screen.
3. Click
Pass Through
from the left side of the screen. The
Pass Through
fields are
explained following this screen example.
Label
Description
Index
Index number of the pass through rule.
MAC Address
Input the host’s MAC address.
Clear
Select the box to delete this rule.
Apply
Click to save.

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