Draytek VigorBX 2000 Series, User Manual

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VigorBX 2000 Series User’s Guide 412
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CSM is an abbreviation of Central Security Management which is used to control IM/P2P
usage, filter the web content and URL content to reach a goal of security management.
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As the popularity of all kinds of instant messenger application arises, communication cannot
become much easier. Nevertheless, while some industry may leverage this as a great tool to
connect with their customers, some industry may take reserved attitude in order to reduce
employee misusage during office hour or prevent unknown security leak. It is similar situation
for corporation towards peer-to-peer applications since file-sharing can be convenient but
insecure at the same time. To address these needs, we provide CSM functionality.
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To provide an appropriate cyberspace to users, Vigor router equips with URL Content Filter
not only to limit illegal traffic from/to the inappropriate web sites but also prohibit other web
feature where malicious code may conceal.
Once a user type in or click on an URL with objectionable keywords, URL keyword blocking
facility will decline the HTTP request to that web page thus can limit user’s access to the
website. You may imagine URL Content Filter as a well-trained convenience-store clerk who
won’t sell adult magazines to teenagers. At office, URL Content Filter can also provide a
job-related only environment hence to increase the employee work efficiency. How can URL
Content Filter work better than traditional firewall in the field of filtering? Because it checks
the URL strings or some of HTTP data hiding in the payload of TCP packets while legacy
firewall inspects packets based on the fields of TCP/IP headers only.
On the other hand, Vigor router can prevent user from accidentally downloading malicious
codes from web pages. It’s very common that malicious codes conceal in the executable
objects, such as ActiveX, Java Applet, compressed files, and other executable files. Once
downloading these types of files from websites, you may risk bringing threat to your system.
For example, an ActiveX control object is usually used for providing interactive web feature. If
malicious code hides inside, it may occupy user’s system.
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We all know that the content on the Internet just like other types of media may be
inappropriate sometimes. As a responsible parent or employer, you should protect those in
your trust against the hazards. With Web filtering service of the Vigor router, you can protect
your business from common primary threats, such as productivity, legal liability, network and
security threats. For parents, you can protect your children from viewing adult websites or
chat rooms.
Once you have activated your Web Filtering service in Vigor router and chosen the categories
of website you wish to restrict, each URL address requested (e.g.www.bbc.co.uk) will be
checked against our server database. This database is updated as frequent as daily by a global
team of Internet researchers. The server will look up the URL and return a category to your
router. Your Vigor router will then decide whether to allow access to this site according to the
categories you have selected. Please note that this action will not introduce any delay in your
Web surfing because each of multiple load balanced database servers can handle millions of
requests for categorization.
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The priority of URL Content Filter is higher than Web Content Filter.