Advanced Port Scanner vs Unicornscan

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.

Unicornscan is a free network reconnaissance tool that sends asynchronous, stateless probes and records responses. Its documented scan modes include TCP SYN scans, UDP probes with protocol-specific payloads, local-network ARP discovery, and stateless TCP traceroute. Alicorn provides a web interface for reviewing results, with scan history, host and port statistics, OS fingerprinting, and network topology visualization. The pgsqldb module can export results to PostgreSQL, which Alicorn uses for storage; Alicorn also starts a PostgREST API with its web server. Optional free DB-IP Lite databases add country, city, and ASN lookups to scan output and the interface. Packages are listed for Debian, Ubuntu, Fedora, RHEL-compatible distributions, and macOS through Homebrew or DMG. Linux capabilities are set automatically so scans can run without root privileges. The Alicorn interface requires Docker and PostgreSQL. Compound scan modes that begin with ARP are limited to targets on the local broadcast domain because ARP requests cannot cross routers. The install guide directs users to the project website and GitHub Issues for support.