Configure Port Triggering - NETGEAR DGND3800B User Manual

N600 Wireless Dual Band Gigabit VDSL2 Modem Router DGND3800B
Application Example: Making 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:
Assign your web server either a fixed IP address or a dynamic IP address using DHCP
1.
address reservation. In this example, your router always gives your web server an IP
address of 192.168.1.33.
In the Port Forwarding screen, configure the router to forward the HTTP service to the local
2.
address of your web server at 192.168.1.33. HTTP (port 80) is the standard protocol for web
servers.
(Optional) Register a host name with a Dynamic DNS service, and configure your router to
3.
use the name. To access your web server from the Internet, a remote user has to know the
IP address that has been assigned by your ISP. 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.

Configure 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 router monitors outbound traffic looking for a specified
outbound "trigger" port. When the router detects outbound traffic on that port, it remembers
the IP address of the local computer that sent the data. The router then temporarily opens the
specified incoming port or ports, and forwards incoming traffic on the triggered ports to the
triggering computer.
While 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.
If you use applications such as multiplayer gaming, peer-to-peer
Note:
connections, real-time communications such as instant messaging,
or remote assistance (a feature in Windows XP), you should also
enable Universal Plug and Play (UPnP).
To configure port triggering, you need to know which inbound ports the application needs.
Also, you need to know the number of the outbound port that will trigger the opening of the
inbound ports. You can usually determine this information by contacting the publisher of the
application or user groups or newsgroups.
Content Filtering
47