Firewall for filtering tunneled data packets
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United States of America Patent
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May 18, 2010
Grant Date -
Jun 19, 2003
app pub date -
Nov 22, 2002
filing date -
Nov 29, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of filtering a tunneled data packet including an outer header and an outer payload, the outer payload including an inner data packet including an inner header and an inner payload, where the value of at least one outer header field of the tunneled data packet is matched to a first rule, and the action defined in the first rule is taken. Taking the action defined in the first rule includes detecting the inner data packet within the tunneled data packet, matching the value of at least one field of the inner data packet to a second rule, and taking the action defined in the second rule.
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