Draytek Vigor2920 Series User Manual page 205

For example, if you add key words such as "sex", Vigor router will limit web access to web
sites or web pages such as "www.sex.com", "www.backdoor.net/images/sex/p_386.html". Or
you may simply specify the full or partial URL such as "www.sex.com" or "sex.com".
Also the Vigor router will discard any request that tries to retrieve the malicious code.
Click CSM and click URL Content Filter Profile to open the profile setting page.
Each item is explained as follows:
Item
Set to Factory Default
Profile
Name
Default Message
Description
Clear all profiles.
Display the number of the profile which allows you to click
to set different policy.
Display the name of the URL Content Filter Profile.
You can type the message manually for your necessity or
click this button to get the default message which will be
displayed on the field of Administration Message.
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Vigor2920 Series User's Guide