Advanced Port Scanner vs PortScannerLabs

Advanced Port Scanner is a free Windows desktop utility for finding open network ports and identifying software versions reachable through them. It scans TCP and UDP ports across an IP address range and lets you specify which ports to check. Multi-threaded scanning is available, while a high-accuracy mode checks each computer repeatedly at a slower pace. For LAN administration, the program provides Wake-On-LAN, remote shutdown, and commands that can run on remote computers. Discovered systems can be opened through HTTP, HTTPS, FTP, Telnet, SSH, RDP, or Radmin, with configurable clients for some protocols. Computer lists can be exported to XML, HTML, or CSV, and favorites can be loaded from XML. Radmin connections require Radmin Viewer. Famatech describes the tool for LAN and networking work, and says shutdown actions require authorization. It is distributed as a Windows executable installer and costs nothing.

PortScannerLabs is a free cloud web tool for checking an IP address or domain for common open, closed, or filtered network ports. It flags risky exposures and separates port state from risk level, with links to guidance about the service and ways to close it. The scanner uses nmap with service and version detection for open ports. A default scan checks 12 common TCP ports, including SSH, Telnet, MySQL, RDP, HTTP, and HTTPS. Leaving the target blank scans the user’s public IP as seen from outside the network. Scans with version detection can take up to 15 seconds. No account, signup, or installation is required. The site describes the tool for home and small-business users, IT administrators, developers, gamers, and self-hosters. Users must confirm authorization before scanning another target. PortScannerLabs rate-limits scans and restricts full-range scanning of arbitrary targets for anonymous users. It says it retains only minimal technical logs needed to operate the service and prevent abuse, and does not sell personal data. The Free port scanner costs nothing.