IAX2Autohack is part of EnableSecurity VoIPPack which is an addon for Immunity CANVAS.

IAX2 is the protocol used by Asterisk PBX to communicate with other Asterisk boxes or with IP Phones. This demonstration shows IAX2Autohack in action. What this tool does is automate theprocess of finding Asterisk servers on the network, enumerating all the extensions and performing a bruteforce password attack. This helps identify accounts with weak passwords. After that, the demo shows how to use the extension and password with an IP Phone.