Patent ID: 9319322
Filing Date: 2016-04-19
CPC Classification: H04L

Claim Text:
1. A network device comprising: a first network card configured to classify input packets, filter and discard a first packet of classified packets, and transmit a second packet of the classified packets to a second network card; the second network card configured to perform deep packet inspection and processing of the second packet received by the first network card; a processor configured to manage the first and second network cards and apply network policies to the first and second network cards, respectively, wherein the first network card filters and discards the packets corresponding to second to fourth layers of the input packets, transmits the packets requiring inspection and not corresponding to the second to fourth layers to the second network card, and transmits other normal packets to networks, wherein the deep packet inspection comprises parsing application services from the packets, retrieving applications policies, and attempting to match the application services with corresponding application policies, and wherein the second network card transfers the packets back to the first network card after changing a payload of the packets according to a matching result of the deep packet inspection, wherein the first network card: a memory configured to store the network policies.