Fport v2.0 is powerful windows tool which reports all open TCP/IP and UDP ports and maps them to the owning application. This is the same information you would see using the 'netstat -an' command, but it also maps those ports to running processes with the PID, process name and path. Fport can be used to quickly identify unknown open ports and their associated applications. Supports Windows NT4, Windows 2000 and Windows XP.
C:\>fport FPort v2.0 - TCP/IP Process to Port Mapper Copyright 2000 by Foundstone, Inc. http://www.foundstone.com Pid Process Port Proto Path 392 svchost -> 135 TCP C:\WINNT\system32\svchost.exe 8 System -> 139 TCP 8 System -> 445 TCP 508 MSTask -> 1025 TCP C:\WINNT\system32\MSTask.exe 392 svchost -> 135 UDP C:\WINNT\system32\svchost.exe 8 System -> 137 UDP 8 System -> 138 UDP 8 System -> 445 UDP 224 lsass -> 500 UDP C:\WINNT\system32\lsass.exe 212 services -> 1026 UDP C:\WINNT\system32\services.exe