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Only this time, you’ll need to specify a filename for the new CA keys. Generating the CA keys for signing is similar to generating a user key pair that you did earlier in this article. Creating the Certificate Authority (CA) Key Instead, the public key is signed using a certificate authority (CA) key. You do not need to map the public key to the authorized_keys or administrators_authorized_keys files on the SSH server. To enable certificate login, follow the same procedure of generating a key pair sans deploying the public key to the SSH server. Like public key authentication, certificate authentication is passwordless or passphrase-protected. This command creates the administrators_authorized_keys file using the New-Itemcmdlet.Ĭonnecting with SSH using Public Key Authentication Configuring Certificate Authentication Copy the command below and run it in PowerShell. Open an elevated Windows PowerShell console if not already.Ģ.

You must create one first.įollow these steps below to create the administrators_authorized_keys file and set its proper access control list (ACL).ġ. But where? For OpenSSH on Windows, the SSH server reads the public keys from the C:\ProgramData\ssh\ administrators_authorized_keys file. Preparing the administrators_authorized_keys File If the private key is compromised, anyone can use it to gain access to your SSH server. You must treat a private key like your password. The public key is stored on the server, while the private key stays on the local computer. In a nutshell, a key pair consists of two keys called the public key and private key, which constitute a set of security credentials to prove your identity. this works but a more secure way to authenticate with an SSH server is by using a key pair. In the previous sections, you connected with a username and password.

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Related: How to use PowerShell to Get a Registry Value Configuring Public Key Authentication

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If you like to save the PowerShell code to download OpenSSH, you can also open a code editor like Windows PowerShell ISE or Visual Studio Code and save it in there. This script will download the latest OpenSSH release, which as of this writing, is v8.1.0.0p1-Beta to the current working directory. Next, copy the code below, paste it in the PowerShell window, and press Enter. On your Windows Server desktop, open an elevated Windows PowerShell console.ģ.

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Related: The Top Free Remote Desktop Connection ManagersĢ.

Connect to the desktop on a Windows Server using Remote Desktop (RDP) or your preferred desktop manager client.

To get started, you’ll first need to download OpenSSH. With this release, you can now set up an SSH server on a Windows machine. But Microsoft has released an open-source port of OpenSSH for Windows. Unlike Linux servers, Windows servers do not have an out-of-the-box SSH server running.

The examples in this article use PowerShell 7.1 in Windows 10. PowerShell 7.1 is available in Windows, Linux, and macOS.

A local computer with PowerShell 7.1 installed.

The server this tutorial will use will have a user account called june and will connect to the server at the IP address of 40.117.77.227 with a hostname of ataWindows.

A Windows Server machine – This article will use Windows Server 2019 Datacenter.

To effectively follow the examples and demos in this article, you’ll need to meet these requirements below.

Connecting with SSH using Certificate Authentication.

Creating the Certificate Authority (CA) Key.

Connecting with SSH using Public Key Authentication.

Deploying the Public Key to the Windows SSH Server.

Preparing the administrators_authorized_keys File.

Changing the Default Shell for OpenSSH to PowerShell.

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Connecting with SSH using Password Authentication.Adding a Windows Firewall Rule to Allow SSH Traffic.