Localhost TCP port scanner

M. Gallant 10/30/2002

This signed applet is a multi-threaded tcp port-scanner for the localhost. It detects and lists active TCP ports over the user-specified range. Enter start and end TCP port numbers (Pt1, Pt2) to scan over. Click Start Port Scan. The first time this applet is run, it downloads and saves to the users "current directory" (typically the desktop folder for IE5+) the IANA port-numbers assignments from: http://www.iana.org/assignments/port-numbers. This locally saved file, _jtport-numbers.txt, is subsequently loaded into a memory when the applet is initalized on startup, and used directly to quickly display requested port assignment information.

[Note: this applet is currently configured to allow only localhost port scanning]
Location of _jtport-numbers.txt file: The IANA port-information file is saved to the "current user directory":
IE6: C:\Documents and Settings\userid\DESKTOP
Netscape 4.7x: C:\Program Files\Netscape\Communicator\Program
Netscape 6,7: C:\Program Files\Netscape\Netscape 6

Michel I. Gallant
neutron@istar.ca