To enable Telnet Client in Windows, use one of the following methods: 1) Open Control Panel, go to Programs > Programs and Features, click Turn Windows features on or off, check Telnet Client, then click OK; 2) Open Command Prompt as Administrator and run dism /online /Enable-Feature /FeatureName:TelnetClient; 3) Open PowerShell as Administrator and run Enable-WindowsOptionalFeature -Online -FeatureName TelnetClient. After enabling, test by running telnet google.com 80 in Command Prompt, and if the connection succeeds, the screen will go blank or show a blinking cursor. Note that Telnet transmits data in plain text, so it should not be used for sensitive tasks on untrusted networks.

Enabling the Telnet Client in Windows is a straightforward process, but it's not turned on by default. Telnet can be useful for testing network connectivity to specific ports or managing network devices. Here’s how to enable it on Windows 10, Windows 11, and Windows Server.

Method 1: Using Control Panel

1. Open Control Panel (you can search for it in the Start menu).
2. Click on Programs > Programs and Features.
3. On the left side, click Turn Windows features on or off.
4. In the pop-up window, scroll down and check the box next to Telnet Client.
5. Click OK.
6. Wait a moment while Windows enables the feature. You may need to restart your computer (though this is rare).

Once enabled, you can use telnet from Command Prompt or PowerShell.

Method 2: Using Command Line (Admin)

If you prefer using the command line, you can enable Telnet via DISM (Deployment Image Servicing and Management):

1. Open Command Prompt as Administrator:

   • Press Win X and choose Command Prompt (Admin) or Windows Terminal (Admin).

2. Type the following command and press Enter:

   

   dism /online /Enable-Feature /FeatureName:TelnetClient

3. Wait for the confirmation message that the operation completed successfully.

Now you can run telnet commands without any issues.

Method 3: Using PowerShell (Admin)

Alternatively, use PowerShell:

1. Open PowerShell as Administrator.

2. Run this command:

   Enable-WindowsOptionalFeature -Online -FeatureName TelnetClient

3. Press Enter and wait for the success message.

How to Test Telnet After Enabling

To verify it’s working, open Command Prompt and try connecting to a server on a common port, like port 80:

telnet google.com 80

If the screen goes blank or you see a blinking cursor, the connection succeeded. If you get an error, the host might be blocking the connection or the port is closed.

?? Note: Telnet transmits data (including passwords) in plain text, so avoid using it for sensitive tasks on untrusted networks.

That’s it—Telnet Client is now enabled and ready to use. Basically just a few clicks or a single command, but it’s often overlooked when troubleshooting network issues.

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