17-12-2012, 06:32 PM
Keyword Filter Testing Manual
Keyword Filter.pdf (Size: 531.22 KB / Downloads: 23)
Introduction
Keyword filters block unwanted web pages on the basis of potentially fallen words found in them. However,
to be sure that a page is indeed offensive, keyword filters nowadays are not designed to block sites on the basis
of just about any potentially offensive word. Instead they measure the number of potentially offensive phrases
and often the number of times they occur so as to allow a limited number of occurrences in pages such as those
on anatomy, forms requiring gender information, crime reports, statistical reports, administrative information, art
etc. The leading keyword blockers like Blue Coat K9 on Windows and Mac, or Dansguardian which is
extremely popular on Linux, or SafeSquid which is popular on Linux and Windows all appear to this method
known as a weighed keyword score.
While Blue Coat K9 Web Protection and Dansguardian come configured with a keyword blocker on
SafeSquid you have to visit http://safesquid.cfg/config, locate the panel titled "Select a Section to Configure",
click the drop-down box and select "Keyword filter", then hit "Submit". Once in the Keyword filter section of
SafeSquid, turn the "Enabled" radio button on and modify the default threshold value of 100 - I use a threshold
of 50 - and click "Submit" not in the panel above but below the textbox labeled "Template". You must also have
an adequate number of rules to create these scores. To know more about SafeSquid read
http://howtoforgeblocking-webpages-based-on-keywords-or-phrases-with-safesquid-proxy.
Now that your know your keyword filter is probably up you will be interested in eliminating the word
probably and making sure it is indeed up! Ironically, the practice when it comes to checking whether you web
filter is effective is to try to access the very adult websites you desire to block and in case your keyword blocker
was not properly installed, configured or launched or cannot otherwise intercept the muck you may be in for an
unpleasant surprise, more so in public or in the presence of family or minors. Nevertheless you can indeed check
your keyword blocker safely by using a free web application known as yourfilter.org which is currently running
version 2 full release. Enter the URL http://www.yourfilter.org in your browser's address bar or click the link.
The default action on the landing site of yourfilter.org v2 is the check which checks whether your keyword filter
is working.