Cable/DSL Router User Guide
To delete a service entry:
1. Clear the entry's all information except for the
Protocol
pull-down list.
2. Click
the
Save
button.
To delete all service entries:
1. Click the
Clear All
button.
2. Click the
Save
button
Note
: If you set the virtual server of the service port as 80, you must set the web
management port on
Security –> Remote Management
page to be any value except
80 such as 8080. Or else there will be a conflict to disable the virtual server.
5.6.2 Port Triggering
Some applications require multiple connections, like Internet games, video
conferencing, Internet calling and so on. These applications cannot work with a pure
NAT router. Port Triggering is used for some of these applications that can work with an
NAT router. You can set up Port Triggering on this page shown in figure 5-15:
Figure 5-15 Port Triggering
Once configured, operation is as follows:
1. A local host makes an outgoing connection using a destination port number defined
in the Trigger Port field.
2. The router records this connection, opens the incoming port or ports associated
with this entry in the Port Triggering table, and associates them with the local host.
3. When necessary the external host will be able to connect to the local host using
one of the ports defined in the
Incoming Ports
field.
¾
Trigger Port
-
The port for outgoing traffic. An outgoing connection using this port
will "Trigger" this rule.
¾
Trigger Protocol
-
The protocol used for Trigger Ports, either
TCP
,
UDP
, or
All
(all
protocols supported by the router).
¾
Incoming Ports Range
-
The port or port range used by the remote system when it
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