Tools: Fport Process to Port Mapper

Fport is a very handy tool to determine which ports are mapped to which process.

You can download it here

From Foundstone (creators of tool):

“fport 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.”

FPort v2.0 - TCP/IP Process to Port Mapper
Copyright 2000 by Foundstone, Inc.

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

The program contains five (5) switches.  The switches may be utilized using either a '/'
or a '-' preceding the switch.  The switches are;

	/?	 usage help
        /p       sort by port
        /a       sort by application
        /i       sort by pid
        /ap      sort by application path

For updates visit:

If you run in to issues running it on server 2003, please run in xp compatibility mode as admin from command prompt

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