Netgear DGND3300 User Manual download pdf (Page 44)

44 | Chapter 3. Security Settings

N300 Wireless Dual Band ADSL2+ Modem Router DGND3300v2 User Manual

Figure 25.

2. Specify the information for port triggering:

• Service Name. Enter a name for the rule, up to 30 characters.

• Service User. The PC on the LAN that can use the port triggering rule to create a

dynamic inbound mapping to it. There are 2 options:

- The port triggering rule is applied to all PCs on the LAN. That is, any PC on the

LAN can use the rule and make the router to open a dynamic mapping to it.

- The port triggering rule is applied only to the user-specified PC on the LAN.

• Service Type. Defines whether the traffic is TCP or UDP.

• Triggering Port. The destination port number of the traffic. That is, when there is a

packet from a LAN PC that the rule is applied to, with the specified service type and

destined to the specified triggering port, the router creates a rule for dynamic mapping

to the LAN PC.

• Required Inbound Connection. This defines what the dynamic mapping is. The

connection type defines whether the dynamic mapping is for TCP traffic, UDP traffic,

or TCP and UDP traffic. The open port range is specified by the starting port and the

ending port, and this defines the port that the dynamic mapping is applied to.

3. Click Apply to save your settings and activate the port triggers that you have enabled.

Blocking Access to Internet Services

The N300 wireless modem router allows you to block the use of certain Internet services by

computers on your network. This is called service blocking or port filtering. Services are

functions performed by server computers at the request of client computers. For example,

Web servers serve Web pages, time servers serve time and date information, and game

hosts serve data about other players’ moves. When a computer on your network sends a

request for service to a server computer on the Internet, the requested service is identified by

a service or port number. This number appears as the destination port number in the

transmitted IP packets. For example, a packet that is sent with destination port number 80 is

an HTTP (Web server) request.

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Netgear DGND3300 User Manual Page 44