Policy based content filtering
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United States of America Patent
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Sep 12, 2017
Issued Date -
N/A
app pub date -
Jul 4, 2015
filing date -
Nov 22, 2005
priority date (Note) -
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Abstract
Methods and systems for processing application-level content of network service protocols are described. According to one embodiment, a network connection is received at a networking subsystem of a firewall. The connection is characterized by a source IP address, a destination IP address and a network service protocol. The network service protocol of the network connection is determined. A matching firewall policy is identified for the connection. When the connection is allowed, it is redirected to a proxy module that is configured to support the network service protocol. A content processing configuration scheme identified by the matching firewall policy is retrieved that includes multiple content processing configuration settings, specifying whether a particular type of content filtering is to be performed, for each of multiple network service protocols. Application-level content of a packet stream associated with the network connection is reconstructed and filtered based on the applicable content processing configuration settings.
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