Making Free Calls

Making free calls from a PC to any landline or mobile phone in the United States or the United Kingdom is not really a security attack, but it is a nice little perk that will enable several other attacks in this chapter. For a few years, the major VoIP soft phones have provided free PC-to-PC calling but charge for calls from PCs to landlines and mobile phones, such as SkypeOut. Using Asterisk PBX, the X-Lite soft client, and VoIPBuster, free calls from a PC to a landline phone are now possible (but only for US or UK phone numbers). Here's how you set it up:

  1. Create a VOIP account with VoIPBuster (http://www.voipbuster.com/), download the VoIPBuster client, and create a username and password that will be used in SIP session setup. ...

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