Screening of data packets in a gateway
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United States of America Patent
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-
Feb 7, 2006
Grant Date -
Jul 18, 2002
app pub date -
Oct 12, 2001
filing date -
Jan 18, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for processing data packets in a gateway element comprises the steps of: comparing a data packet to screening information comprising a set of rules, and processing a data packet according to a rule belonging to the set of rules, the header information of said data packet matching the header information of said rule. The method is characterized in that said screening information is hierarchically structured so that it comprises a first rule, which specifies first header information, and a subset of rules relating to said first rule, and in that in said step of comparing a data packet, said data packet is compared to said subset of rules only if the header information of the data packet matches the header information of the first rule. A gateway element, an arrangement, and a data structure comprising screening information are also presented.
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