User's Manual

Chapter 14 Content Filtering
NBG-417N User’s Guide
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Since the NBG-417N checks the URL’s domain name (or IP address) and file path separately, it will
not find items that go across the two. For example, with the URL www.zyxel.com.tw/news/
pressroom.php, the NBG-417N would find “tw” in the domain name (www.zyxel.com.tw). It would
also find “news” in the file path (news/pressroom.php
) but it would not find “tw/news”.
14.4 Filter Screen
Use this screen to restrict web features, add keywords for blocking and designate a trusted
computer. Click Security > Content Filter to open the Filter screen.
Figure 78 Security > Content Filter > Filter
The following table describes the labels in this screen.
Table 52 Security > Content Filter > Filter
LABEL DESCRIPTION
Enable URL
Keyword Blocking
The NBG-417N can block Web sites with URLs that contain certain keywords in
the domain name or IP address. For example, if the keyword "bad" was
enabled, all sites containing this keyword in the domain name or IP address will
be blocked, e.g., URL http://www.website.com/bad.html would be blocked.
Select this check box to enable this feature.
Keyword Type a keyword in this field. You may use any character (up to 64 characters).
Wildcards are not allowed. You can also enter a numerical IP address.
Keyword List This list displays the keywords already added.
Add Click Add after you have typed a keyword.
Repeat this procedure to add other keywords. Up to 64 keywords are allowed.
When you try to access a web page containing a keyword, you will get a
message telling you that the content filter is blocking this request.
Delete Highlight a keyword in the lower box and click Delete to remove it. The
keyword disappears from the text box after you click Apply.
Clear All Click this button to remove all of the listed keywords.