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Table Of Contents  CertiGuide to Security+
 9  Chapter 2:  Communication Security (Domain 2.0; 20%)
      9  2.3  The Web
           9  2.3.3  Instant Messaging
                9  2.3.3.1  Vulnerabilities

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Unauthorized Use of Internet IM

Port blocking may not be effective to prevent connectivity to external IM services. For example, AOL IM will search for ANY open port to pass through, rendering a firewall or proxy server ineffective206.


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206. http://searchwindowsmanageability.techtarget.com/originalContent/0,289142,sid33_gci830794,00.html

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