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Scanning software

Identifies email or 

 web-  page  access  that 

breaches company 

guidelines or  acceptable- 

 use  policies.

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Chapter 11  Analysis and design

example. Rules will also be set up, for example to ban email attachments over a particular size 

or containing swearing, as indicated by Figure 11.28. Such tools can also give a picture of the 

most popular types of site or content. This might show, for example, how much time is being 

wasted accessing news and sports sites.

Such software usually also has blocking or filtering capabilities. 

Filtering software

 such as 

Websense (

www.websense.com

) can detect and block other activities such as:

● 

Peer-to-peer (P2P)  file-  sharing, for example of MP3 audio files.

● 

Instant messaging using Yahoo! Messenger or Microsoft Instant Messenger.

● 

The use of streaming media (e.g. audio and video) and other  high-  bandwidth applications.

● 

Accessing specified sites, e.g. social networks, news sites or personal email programs, since 

analysis has shown that staff spend so much time using them.

● 

Spyware which seeks to send out information collected from computers.

● 

Adware programs which place adverts or  pop-  ups.

● 

Employee hacking.

Websense and similar products can block sites in different categories, for different types 

of staff, according to the  acceptable-  use policy of the organisation using a database (

www. 

websense.com/products/about/database/categories.cfm

) that contains over 1.5 million 

websites in many categories of which we list just some to illustrate the degree of control avail-

able to the employer. Examples of the categories include:

● 

Abortion  or   Pro-  Choice  or   Pro-  Life

● 

Adult Material

● 

Parent category that contains the categories: Adult Content, Lingerie and Swimsuit, 

Nudity, Sex, Sex Education

● 

Adult Content

● 

Advocacy Groups

● 

Business and Economy

● 

Financial Data and Services

● 

Drugs.