For increasing cyberattacks, web applications require robust and scalable security mechanisms. We suggest a centralized firewall structure that effectively detects and blocks attacks on multiple hosts simultaneously. The system is a command center that collects information about attacks from clients not yet attacked. Information collected is transmitted to the afflicted client only after receiving all necessary details. The system works by detecting and neutralizing various forms of cyberattacks such as SQL injection (SQLi), cross-site scripting (XSS), and distributed denial-of-service (DDoS) attacks. As soon as malicious activity is detected, the system will automatically block the attacking IP address, preventing further intrusion. This process enhances real-time protection, limiting the likelihood of repeated cyberattacks on interconnected web applications. By employing a single defense method, this centralized firewall maximizes threat intelligence sharing, rendering all the connected clients secure. Unlike standalone firewalls in the past, this approach consolidates security policies and enhances cybersecurity resilience on various platforms. Further, this system not only secures web applications against emerging threats but also ensures that organizations meet cybersecurity compliance requirements by hosting a neat and responsive security mechanism. The centralized structure of the firewall provides early attack detection, largely reducing downtime, data loss, and monetary loss.