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N150 Wireless ADSL2+ Modem Router DGN1000Bv3
Application Example: Make a Local Web Server Public
If you host a web server on your local network, you can use port forwarding to allow web
requests from anyone on the Internet to reach your web server.
To make a local web server public:
1. Assign your web server either a fixed IP address or a dynamic IP address using DHCP
address reservation.
In this example, your modem router always gives your web server an IP address of
192.168.0.33.
2. On the Port Forwarding / Port T
riggering screen, configure the modem router to forward the
HTTP service to the local address of your web server at 192.168.0.33.
HTTP (port 80) is the standard protocol for web servers.
3. (Optional) Register a host name with a Dynamic DNS service, and configure your modem
router to
use the name.
To access your web server from the Internet, a remote user has to know the IP address
that your ISP assigned. However, if you use a Dynamic DNS service, the remote user can
reach your server by a user-friendly Internet name, such as mynetgear
.dyndns.org.
Set Up and Manage Port Triggering
Port triggering is a dynamic extension of port forwarding that is useful in these cases:
• More than one local computer needs port forwarding for the same application (but not
simultaneously).
• An application needs to open incoming ports that are different from the outgoing port.
When port triggering is enabled, the modem router monitors outbound traf
fic looking for a
specified outbound “trigger” port. When the modem router detects outbound traffic on that
port, it remembers the IP address of the local computer that sent the data.
The modem router
then temporarily opens the specified incoming port or ports and forwards incoming traffic on
the triggered ports to the triggering computer.
Port forwarding creates a static mapping of a port number or range to a single local computer.
Port triggering can dynamically open ports to any computer that needs them and can close
the ports when they are no longer needed.
Note: If you use applications such as multiplayer gaming, peer-to-peer
connections, real-time communications such as instant messaging,
or remote assistance (a feature in Windows XP), NETGEAR
recommends that you also enable Universal Plug and Play (UPnP).
For more information, see Universal Plug and Play on page 122.