packet filter
[ˈpækɪt ˈfɪltər]
nounpl: packet filters
filtro de pacotes
1. A network security mechanism that examines data packets and permits or denies their passage based on predefined rules, typically analyzing source/destination IP addresses, ports, and protocols
The company implemented a packet filter to block unauthorized incoming traffic on port 23.
A empresa implementou um filtro de pacotes para bloquear tráfego de entrada não autorizado na porta 23.
2. A stateless firewall that operates at the network layer (Layer 3) and transport layer (Layer 4) of the OSI model
Unlike stateful firewalls, a packet filter doesn't maintain connection state information.
Diferentemente de firewalls com estado, um filtro de pacotes não mantém informações de estado da conexão.
Packet filters are fundamental to network security in both Brazilian and American IT infrastructure. The term is primarily technical and used in IT/networking professional contexts. In Brazil, as internet infrastructure and cybersecurity awareness have grown, the term 'filtro de pacotes' has become standard in corporate and educational IT environments.
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