Netstat.exe, located in the Windows ‘System32’ folder, allows you to view ports that are open or in use on a particular host, but should not be confused with a network port scanner which actually probes a host for open ports. The first tool of note is one many admin and support folk might have heard of the Windows command line utility called netstat.exe. Read Scanning Open Ports in Windows: A Quick Guide (part 2) here and Scanning Open Ports in Windows: Part 3 (NMAP) here. Also, don’t forget to check out the other two posts about scanning open ports in Windows which are a continuation of this post and use different solutions.
You might just be surprised at how effective these free utilities are at helping you to scan open ports and get to the root of the problem. In this article we’ll take a quick look at how to view open ports using a number of lightweight freeware tools for Microsoft Windows. When troubleshooting client or server side application network connectivity issues, it is often necessary to determine if access to a certain port that the application uses is being blocked. This post has been reviewed and the information is still relevant as of June 2018.
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