Netgear WNR3500 Manual Do Utilizador

3-4

Restricting Access From Your Network

2. Enable service blocking by selecting either Per Schedule or Always, and then click Apply. 

To block by schedule, be sure to specify a time period in the Schedule screen. For information 
about scheduling, see 

.

3. Specify a service for blocking by clicking Add. The Block Services Setup screen displays.

4. From the Service Type list, select the application or service to be allowed or blocked. The list 

already displays several common services, but you are not limited to these choices. To add any 
additional services or applications that do not already appear, select User Defined.

5. Select the radio button for the IP address configuration you want to block, and then enter the 

IP addresses in the appropriate fields.

6. Click Add to enable your Block Services Setup selections.

To define a service, first you must determine which port number or range of numbers is used by 
the application. The service port numbers for many common protocols are defined by the Internet 
Engineering Task Force (IETF) and published in RFC1700, “Assigned Numbers.” Service 
numbers for other applications are typically chosen from the range 1024 to 65535 by the authors of 
the application. You can often determine port number information by contacting the publisher of 
the application, by asking user groups or newsgroups, or by searching.