Also, because they are stateless, they are vulnerable to source routing and tiny fragmentation attacks. They are unable to protect against malicious data packets arriving from trusted source IPs because they lack the necessary packet inspection capability. The security they provide, however, is rudimentary. Higher-level firewalls, on the other hand, provide outstanding performance. The static packet filter has no discernible influence on speed, and its low processing requirements made it an appealing alternative from the start when compared to other firewalls that slowed responsiveness.
The main benefits of packet filtering firewalls are that they are fast, cheap, and effective. Packets are routed through the packet filtering firewall only if they match predefined filtering rules otherwise, they are declined. It is a network security solution that allows network packets to move across between networks and controls their flow using a set of user-defined rules, IP addresses, ports, and protocols.
A packet filtering firewall is the most basic type of firewall that controls data flow to and from a network.
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