How to use TcpView In Computer Networks
Another option is to use the TcpView utility from Microsoft’s Sysinternals suite of tools. This utility provides a more user-friendly interface for viewing active TCP/IP connections, along with additional information such as the process ID and process name for each connection. Steps to be followed:
Step 1: Download the TcpView utility from the Microsoft Sysinternals website. You can find the download link on the TcpView page of the Sysinternals website.
Step 2: Extract the downloaded file and run the TcpView.exe file to launch the TcpView utility. This will open the TcpView window, which shows a list of all active TCP/IP connections on your machine.
Step 3: Open the tcpview.exe (application).
By default, TcpView will display the following columns in the list of connections:
Protocol: Shows the protocol being used for the connection (TCP or UDP)
Local Address: Shows the local address and port being used for the connection
Remote Address: Shows the remote address and port being connected to
State: Shows the current state of the connection (e.g. Established, Listen, etc.)
You can use the “Local Address” and “Remote Address” columns to see which ports are being used by which applications. For example, if you see a connection with a local address of “127.0.0.1:80”, this means that the local application is using port 80 for outgoing connections.
How To Check Open TCP/IP Ports in Windows?
Certain apps and processes in Windows 10 can cause problems if you’re not properly connected to the internet. Firewalls can cause these connection issues when they cannot determine whether incoming and outgoing connections pose a threat. Work around this issue and open ports for incoming and outgoing connections. We will know to check whether a TCP port is open or closed on the Windows operating system.
Basically, many times we need to check the port status when any of the below issues results in closing the port.
- They may not be properly working.
- External IP addresses that are in use may be set to private IPs.
- Firewall rules may block the network.
There are several ways to check open TCP/IP ports in Windows. Here are a few options:
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