A Case Study Using Companies to Examine the Nmap Tool’s Applicability for Network Security Assessment

Popular open-source software called Nmap (Network Mapper) is used for network management, security audits, and network research. This study’s goal is to investigate port scanning methods utilizing the Nmap application and to find open ports and services on a target host or network. It is intended to scan networks and hosts to discover the operating systems, services, and other data that can be used for network inventory, vulnerability analysis, and penetration testing. To learn as much as it can about the target machine or network, Nmap employs a range of scanning techniques, including port scanning, OS detection, version identification, and scripting. With relation to professional and network security-related concerns, such as operating system guesses, the number of open/closed/filtered ports, the name of the Web server, etc. This article discusses the 50 companies (portals) from India which include shopping sites, educational institutions, hospital sites, etc. The results are analyzed from a security standpoint using the Nmap utility.