What is stateful firewall




Performance improvements in proxy-based firewalls come in the form of stateful firewalls that monitor information fields about a connection and prevent the firewall from examining each packet. This greatly reduces the latency caused by the firewall.



different types of firewalls


For example, these firewalls may not inspect incoming packets that are identified in response to legitimate outbound connections that have already been checked by adhering. The initial inspection verifies that the connection is allowed, and by keeping this status in memory, the firewall can pass the next traffic that is part of the same conversation without examining each packet.

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