Ubee Interactive
3.7
Gateway
DDW3612 Subscriber User Guide
•
July, 2010
31
3.7.11
Gateway - Forwarding
Port forwarding settings may be required to resolve issues where data is sent out from
a local host to the internet but the return path of expected data is not being received
by your local host. Or, you have an application or service running on your local
network (on a local host) that cannot be accessed from the internet directly (e.g. a
request to a local audio server). Port forwarding simply tells the cable modem to which
computer on the local area network to send the data. Here are some examples:
XBOX/PlaySation
—Some games/applications may require port forwarding.
Home Security Systems
—Some security systems that use the internet may
require port forwarding.
Audio Servers/VOIP
—Port forwarding may be required to fully enable these
applications/services.
Note:
If your host system(s)/applications do
not
have communications issues with
the internet, Forwarding is
not
needed.
You will need two major pieces of information to setup forwarding:
IP address(s) of local host systems
(e.g. XBOX) for which you need to setup a
port forwarding rule. See the continuing discussion below for how to obtain the IP
address(s).
The
port numbers
that a local host’s application listens to for incoming
requests/data (e.g. a game or other service). These port numbers should be
available in the documentation associated with the application. You can also refer
to
http://portforward.com
for more information.
The following tasks are recommended to support the setup of forwarding rules:
Enable UPNP (Universal Plug and Play). This may resolve the issue you have
without the need to set forwarding rules. Access the web interface of the cable
modem, see
page 7
. Select
Gateway
from the top menu, then
Options
from the
left menu. Select the option to enable UPNP. Test your local host/application (e.g.
XBOX) to determine correct functionality. If it is still not properly communicating,
continue with forwarding.
“Tools - Client List” on
page 64
—Use this option to obtain the MAC and IP address
of the internal host for which you are setting up a forwarding rule. You will also
need these for the following task.
“Gateway - Static Lease” on
page 24
—Before setting up forwarding, you are
recommended to assign a Static IP lease to the client/host to which you are setting
up forwarding. This way, the IP does not change and disrupt your forwarding rules.
For example, if you are hosting a web server in your internal network and you wish
to setup a forwarding rule for it, you should assign a static IP lease to that system
to keep the IP from renewing and disrupting the forwarding rule.
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