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Chapter 31 Content Filter Screens
ZyWALL USG 300 User’s Guide
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31.8 Keyword Blocking URL Checking
The ZyWALL checks the URL’s domain name (or IP address) and file path separately when
performing keyword blocking.
The URL’s domain name or IP address is the characters that come before the first slash in the
URL. For example, with the URL www.zyxel.com.tw/news/pressroom.php
, the domain name
is www.zyxel.com.tw
.
The file path is the characters that come after the first slash in the URL. For example, with the
URL www.zyxel.com.tw/news/pressroom.php
, the file path is news/pressroom.php.
Since the ZyWALL 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 ZyWALL 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”.
Add Forbidden Web Site Enter host names such as www.bad-site.com into this text field. Do not
enter the complete URL of the site – that is, do not include “http://”. All
subdomains are also blocked. For example, entering “bad-site.com”
also blocks “www.bad-site.com”, “partner.bad-site.com”, “press.bad-
site.com”, etc.
Use up to 63 characters (0-9a-z-). The casing does not matter.
Forbidden Web Sites This list displays the forbidden web sites already added.
Add Click this button when you have finished adding the host name in the
text field above.
Delete Select a web site name from the Forbidden Web Sites list, and then
click this button to delete it from that list.
Blocked URL Keywords This section allows you to block Web sites with URLs that contain
certain keywords in the domain name or IP address.
Add Blocked Keyword Enter a keyword or a numerical IP address to block. You can also enter
a numerical IP address.
Use up to 63 case-insensitive characters (0-9a-zA-Z;/?:@&=+$\.-
_!~*'()%,). For example enter Bad_Site to block access to any web
page that includes the exact phrase Bad_Site. This does not block
access to web pages that only include part of the phrase (such as Bad
for example).
Blocked URL Keywords This list displays the keywords already added.
Add Click this button when you have finished adding the key words field
above.
Delete Select a keyword from the Blocked URL Keyword list, and then click
this button to delete it from that list.
OK Click OK to save your changes back to the ZyWALL.
Cancel Click Cancel to exit this screen without saving your changes.
Table 150 Anti-X > Content Filter > Filter Profile > Add or Edit > Customization (continued)
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