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Fraud over Internet Protocol (FoIP) is the criminal act of stealing network capacity while undermining Voice over Internet Protocol (VoIP) device vulnerabilities.
The term was coined in 2006 after two men were arrested for hacking an unprotected corporate IP network and the networks of several VoIP providers. The hackers then rerouted the organization's network traffic to VoIP providers, resulting in call terminations and hefty interconnect charges for providers.
FoIP can be prevented by adhering to the following security practices: