Internet, Networking, & Security Home Networking Free Port Scanner Software Find the ports and services that are open on your network by Tony Bradley, CISSP-ISSAP Writer our editorial process LinkedIn Tony Bradley, CISSP-ISSAP Updated on February 20, 2020 TommL / Getty Images Home Networking The Wireless Connection Routers & Firewalls Network Hubs ISP Broadband Ethernet Installing & Upgrading Wi-Fi & Wireless Tweet Share Email Nmap ("Network Mapper") is an open-source utility for network exploration or security auditing. It was designed to rapidly scan large networks, although it works fine against single hosts. Foundstone VisionReports all open TCP and UDP ports and maps them to the owning process or application. Foundstone FPortIdentify unknown open ports and their associated applications. Foundstone ScanlineFormerly FScan. Command-line port scanner. Foundstone SuperScanPowerful TCP port scanner, pinger, resolver. Shields Up!Shields UP! benignly probes the target computer at your location. Since these probings must travel from our server to your computer, you should be certain to have the administrative right-of-way to conduct probative protocol tests through any and all equipment located between your computer and the internet. Angry IP ScannerAngry IP scanner is a very fast IP scanner for Windows. The program itself is small and it can scan IPs in any range. Angry IP scanner first pings each IP address to see if it's live then resolves hostnames, scans ports, etc. as you have configured the scan. It also has additional features, like NetBIOS information (computer name, workgroup name, currently logged in user and MAC address) and it can save results data as CSV, TXT, HTML, XML or IP-Port list files. LANSpyLanSpy is a network security scanner that allows you to gather a variety of different information about computer: Domain and NetBios names, MAC address, Server information, Domain and Domain controller information, Remote control, Time, Discs, Transports, Users, Global and local users groups, Policy settings, Shared resources, Sessions, Open files, Services, Registry and Event log information. PortScan 2000A fast and easily configurable port scanner. You can set what ports to scan and how many ports to scan at once. Not intended for illegal use, only run port scans on your own computer. Blue's Port ScannerA good port scanner is just one of the basic tools anyone who is seriously interested in the internet needs.