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Abstract

Described are computer-based methods and apparatuses, including computer program products, for packet signaling content control on a network. The content control includes two sets of filters--an ingress filter set and an egress filter set. For packets coming into an internal network, the packets (e.g., SIP packets) are filtered by an ingress filter associated with the external network and which determines whether to discard sets of information from the packet description information (e.g., a header, an optional header). The packet is also filtered by an egress filter associated with the internal network and which determines whether to discard sets of information from the packet description information. The packet is transmitted to the internal network. For packets leaving the internal network, the filtering occurs in the opposite direction (e.g., egress filter associated with the internal network and then ingress filter associated with the external network).

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First Claim