Scan for open ports. Davtri Fingerprinting Port Scanner (Davtri fScanner for short) is a fast, cocoa, multi-threaded, finger-printing port scanner. The application will search the entered host for open ports that are in the provided range or list, it will then report the ports which are open as well as which services tend to be registed on those ports. The application also allows you to save the report to a text file for later review, analysis or reporting.