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CENTRIA WNDR4700/WNDR4720 
Keyword Blocking of HTTP Traffic
Use keyword blocking to prevent certain types of HTTP traffic from accessing your network. 
The blocking can be always or according to a schedule.
1. 
Select Advanced > Security > Block Sites to display the following screen:
2. 
Select one of the keyword blocking options:
•     
Per Schedule
. Turn on keyword blocking according to the Schedule screen settings.
•     
Always
. Turn on keyword blocking all the time, independent of the Schedule screen.
3. 
In the keyword field, enter a keyword or domain, click Add Keyword, and click Apply.
The keyword list supports up to 32 entries. Here are some sample entries:
•     
Specify XXX to block http://www.badstuff.com/xxx.html.
•     
Specify .com if you want to allow only sites with domain suffixes such as .edu or .gov.
•     
Enter a period (.) to block all Internet browsing access.
To delete a keyword or domain:
1. 
Select the keyword you want to delete from the list.
2. 
Click Delete Keyword and then Apply to save your changes.
To specify a trusted computer:
You can exempt one trusted computer from blocking and logging. The computer you exempt 
has to have a fixed IP address.
1. 
In the Trusted IP Address field, enter the IP address.
2. 
Click Apply to save your changes.