Circuit-level GatewaysĬircuit-level gateways are another simplified type of firewall that can be easily configured to allow or block traffic without consuming significant computing resources. Because these types of firewalls do not prevent web-based attacks, they are not the safest. While packet-filtering firewalls can be considered a fast solution without many resource requirements, they also have some limitations. These firewalls are designed to block network traffic IP protocols, an IP address, and a port number if a data packet does not match the established rule-set. It acts like a management program that monitors network traffic and filters incoming packets based on configured security rules.
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