Internet multicast may become of crucial importance in the upcoming digital multimedia distribution. While implemented in almost all networking and end-user's systems, deployment is blocked by the {"}multicast deadlock{"}: network providers do not enable it due to it nearly not being used, making in turn the use of it not an option for content providers. CastGate is a transitional technology to allow content providers to give their customers transparent {"}simulated{"} multicast access trough tunneling to public multicast tunnel servers. The increasing volume of multicast traffic may then provide an incentive to (commercial) network providers to enable multicast to Internet users.