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Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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63/00
Network architectures or network communication protocols for network security
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H04L63/02
for separating internal from external traffic, e.g. firewalls
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H04L63/0227
Filtering policies
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H04L63/0254
Stateful filtering
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