Autonomously Bypassing Voip Filters With Asterisk: Let Freedom Ring

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Presented at The Last HOPE 2008 by

Blake Cornell

Jeremy Mcnamara

Foreign governments and ISPs within Panama, Belize, the Caribbean, Mexico, Brazil, the UAE, China, India, Saudi Arabia, and others have implemented VoIP filters of some type. The effect is obvious - phone calls are effectively blocked. How can Asterisk developers and providers develop mechanisms to help maintain communication through the wake of government supported access control mechanisms?