What is a Proxy Firewall? - Definition from WhatIs.com

Proxy firewalls filter traffic at the application layer, providing more security than traditional firewalls. Find out the pros and cons of using them.
A proxy firewall is a network security system that protects network resources by filtering messages at the application layer.

Proxy server - Wikipedia

What are firewalls in a network? - Quora

Firewall vs Proxy: Detailed Comparison » Network Interview

What is Proxy Server? Meaning and Types - javatpoint

What Is a Proxy Server Used For? (And How Does It Work?) - Kinsta®

What is Firewall Security 4 Different Types of Firewalls

What Is a Firewall? Definition and Types of Firewall

What is stateful inspection in networking?

Class Diagram for Application Proxy Firewall Pattern