Packet filter for data network, has analysis and control logic unit provided for real-time comparison of forwarded data packet with filter criterion for determining desired data packet and/or undesired data packet

摘要

The packet filter (1,2) has receiving channels (7,10) and transmission channels (8,9). An analysis and control logic units (11,11a) are provided for real-time comparison of forwarded data packet with filter criterion for determining desired data packet and/or undesired data packet. The flow of undesired data packet determined with respect to the filter criterion is stopped. The receiving channel and transmission channel through which the undesired packet data are received are disabled completely with respect to recognition of undesired data packet. An independent claim is included for method for prevention of incorrect data packet in data network.