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BackTrack 5 Cookbook by David De Smet, Willie Pritchett

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Finding valid extensions

When trying to attack VoIP phones, we need to be able to identify valid phones on the network. In this recipe we will use Svwar to find valid extensions on a network. Svwar is a part of the SIPVicious suite of tools that were created in Python to audit VoIP systems and networks supporting the protocol.

Svwar allows you the ability to:

  • Identify PBX extensions through SIP proxies.
  • Scan for a large range of extensions in numerical format.
  • Resume previous scans. This is useful if you ever need to stop the program for any reason; you will be able to pick up from where you left off.

Getting ready

The following requirements need to be fulfilled:

  • You will need an Internet or intranet connection to complete this recipe
  • You will also need ...

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