CNSE 4.1 Exam Preparation GuideV3.pptx - Palo Alto Networks
CNSE 4.1 Exam Preparation GuideV3.pptx - Palo Alto Networks
CNSE 4.1 Exam Preparation GuideV3.pptx - Palo Alto Networks
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Blocking Skype<br />
• The skype application is classified on the PAN device as two separate<br />
applications: skype-probe and skype.<br />
• In general, think of the skype-probe application as the control channel,<br />
and “skype” application as the data channel.<br />
• Since skype is so evasive, the way you prevent skype from sending or<br />
receiving voice or video is by allowing skype-probe, but blocking<br />
skype.<br />
• This forces skype to use a communication that is easy to predict and<br />
block via App-ID<br />
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