Firewalls are utilised in a variety of applications and are created using cutting-edge security strategies. In the early phases of internet technology, networks require specific security measures, particularly in a client-server paradigm, which is a fundamental architecture in contemporary computing. In this domain, firewalls are already providing security across networks of various complexity. Firewalls are well-known for monitoring traffic and reducing device vulnerabilities. The most critical network security component was the firewall. Each user that talks with their system need time to arrive. As a result, distinguishing which users are genuine among them and whose network interactions are secure, whether local or global, is wasteful. The firewall is one of the most important and often used functions. We are addressing these issues by building a firewall on a private network to offer adequate user analysis. This helps distinguish between normal and abnormal user behaviour, allowing harmful actions to be avoided.We are comparing execution time of firewall in different Operating systems. The efficiency of the firewall's security protection is determined by the quality of the policy provided in the firewall. The most important aspect is detecting and resolving network issues. This method might be used to avoid irreversible losses, strengthen company security, and provide secure access.