Enterprises rely on the Internet as a corporate network, but it\'s unreliable, opaque, and insecure. Network Guards (NGFWs) are crucial in protecting against internet-based attacks, gathering threat information from various sources. Vendors are adding advanced network traffic analysis, such as signature-based intrusion detection and application-specific packet inspection, to their NGFWs. Advancements in NGFWs enable them to detect and prevent sophisticated attacks, while the integration of machine learning and artificial intelligence enhances their real-time threat identification and response capabilities.