D-Link DWC-1000 User Manual
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Section 8 - Security
Dynamic Port Forwarding
Path: Security > Firewall > Dynamic Port Forwarding > Application Rules
Application rules are also referred to as port triggering. This feature allows devices on the LAN or DMZ to request
one or more ports to be forwarded to them. Port triggering waits for an outbound request from the LAN/DMZ
on one of the defined outgoing ports, and then opens an incoming port for that specified type of traffic. This can
be thought of as a form of dynamic port forwarding, while an application is transmitting data over the opened
outgoing or incoming port(s).
Port triggering application rules are more flexible than static port forwarding that is an available option when
configuring firewall rules. This is because a port triggering rule does not have to reference a specific LAN IP or IP
range. Also, ports are not left open when not in use, thereby providing a level of security that port forwarding
does not offer.
Note:
Port triggering is not appropriate for servers on the LAN, since there i s a dependency on the LAN device making
an outgoing connection before incoming ports are opened.
Some applications require that when external devices connect to them, they receive data on a specific port
or range of ports in order to function properly. The controller must send all incoming data for that application
only on the required port or range of ports. The controller has a list of common applications and games with
corresponding outbound and inbound ports to open. You can also specify a port triggering rule by defining the
type of traffic (TCP or UDP) and the range of incoming and outgoing ports to open when enabled.
1. Click
Security
>
Firewall
>
Dynamic Port Forwarding
>
Application Rules
tab.
Application Rules
2. Right-click an entry and select either
Edit
or
Delete
. To add a new schedule, click
Add New Application
Rule
.
