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How do I find out which program and process ID accesses a given IP address in Windows?


Is it possible to catch, which program is accessing a specific IP address?


I found my computer is flooding and wish to check addresses one by one.


May be it is possible to set up some audit for this?



Answer



TCPView Solution


TCPView from SystemInternals will display "detailed listings of all TCP and UDP endpoints on your system, including the local and remote addresses and state of TCP connections."



TCPView is a Windows program that will show you detailed listings of all TCP and UDP endpoints on your system, including the local and remote addresses and state of TCP connections. On Windows Server 2008, Vista, and XP, TCPView also reports the name of the process that owns the endpoint. TCPView provides a more informative and conveniently presented subset of the Netstat program that ships with Windows. The TCPView download includes Tcpvcon, a command-line version with the same functionality.


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  • Make sure you have "Resolve Addresses" unticked to get IP Addresses instead of Domain Names.


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You can sort the results by "Remote Address" to find the IP Address you are interested in.


Example:




  • This screenshot shows Firefox connecting to stackoverflow.com.


    enter image description here





CurrPorts Solution


CurrPorts from Nirsoft provides very similar functionality.



CurrPorts is network monitoring software that displays the list of all currently opened TCP/IP and UDP ports on your local computer. For each port in the list, information about the process that opened the port is also displayed, including the process name, full path of the process, version information of the process (product name, file description, and so on), the time that the process was created, and the user that created it.


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Example:




  • This screenshot shows Firefox connecting to stackoverflow.com.


    enter image description here





What if I want to log the results?


TcpLogView also from Nirsoft provides logging of TCP connnections.



TcpLogView is a simple utility that monitors the opened TCP connections on your system, and adds a new log line every time that a TCP connection is opened or closed. For every log line, the following information is displayed: Even Time, Event Type (Open, Close, Listen), Local Address, Remote Address, Remote Host Name, Local Port, Remote Port, Process ID, Process Name, and the country information of the Remote IP (Requires to download IP to country file separately.)



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Disclaimer


I am not affiliated with SystemInternals (part of Microsoft) or Nirsoft in any way, I am just an end user of their (free) utilities.


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