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Stateful firewall checks more than just the ACK flag;it inspects the sequence numbers to ensure the correct state of the TCP session.

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14y ago
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14y ago

Packet filtering firewall deals with the IP Layer header only [layer 3] whiles Application layer firewall filtering deals with the application layer [layer 7] of the network model.

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14y ago

Search for SPI and Firewall in Google. You don't find static packet firewalls anymore. A Cisco router does this kind of filtering in an Access List, the Cisco firewalls are SPI type.

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Q: What is the difference between static packet filter firewall operation and stateful firewall operation?
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