What are the different types of firewalls?

Question

Accepted Answer

Firewalls are security devices that monitor and control incoming and outgoing network traffic based on predetermined security rules.

Packet Filtering Firewall: Inspects packets and allows or blocks them based on IP addresses, ports, and protocols. Example: Cisco ASA.
Stateful Inspection Firewall: Tracks the state of active connections and makes decisions based on the context of traffic. Example: Check Point Firewall.
Proxy Firewall: Acts as an intermediary between users and the internet, filtering requests and responses. Example: Squid Proxy.
Next-Generation Firewall (NGFW): Combines traditional firewall capabilities with advanced features like intrusion prevention and application awareness. Example: Palo Alto Networks.
Web Application Firewall (WAF): Specifically designed to protect web applications by filtering and monitoring HTTP traffic. Example: AWS WAF.

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