Ssh Config Keypair

Skip this for now. SSH key generation and GitHub configuration. SSH Configuration Packet Tracer Lab. ip ssh rsa keypair-name SSH-KEYS. The argument. In the following example, we told the router to use the previously created keypair and to use SSH version 2: router01(config)#. In the following example, we told the router to use the previously created keypair and to use SSH v 2:. Most IT pros know that using Telnet to manage routers, switches, and firewalls is not exactly a security best practice. ssh implements public key authentication protocol automatically, using one of the DSA, ECDSA or RSA algorithms. To configure SSH authentication, you need to execute the following main steps: Configure Server Authentication; Configure User Authentication; Configure the Git LFS or CLI Client; Configuring Server Authentication. Protocol: Select either SSH or Telnet protocol be used for the account. cisco router cisco-ios-12 cisco-ios-15 ssh share | improve this question. Working with non-default SSH key pair paths. This is a text file which is relatively easy to read; we'll be looking for two entries to modify. *From a command prompt, type “cacls c:\program files\openssh /t /e /c /g Administrators:F” * – Performed this for the c:\ssh folder, which was the OpenSSH folder on my PC. I have an rsa keypair and ecdsa keypaor). First, ssh is configured to print out a big warning message if our key has file permissions that would allow it to be read by anyone but us. TR-Router(config)# ip ssh ? authentication-retries Specify number of authentication retries Port Starting (or only) port number to listen on Rsa Configure RSA keypair name for SSH source-interface. The key pair (or keypair) consists of two parts:. Instead of connecting through login/password to a remote host, SSH allows you to use key-based authentication. All new connections will use forwarding. To do so, first we need to generate a SSH key pair (RSA or DSA) by running the ssh-keygen command. First of all I discovered that the minimum keysize between SSH and dropbear keys are 768 BITS! Keep this info everytime in your mind. Yubikey for SSH Authentication (Initial Configuration of a Yubikey) GPG 2. Click Edit Config File to open the Mercurial global configuration file (~/. SSH Configuration Packet Tracer Lab. In some SGOS 6. SSH keys provide an easy, yet extremely secure way of logging into your server. Your private key. Understanding public key authentication. Be careful that SSH2 is NOT upward compatible of SSH1. SSH on your procurve is now configured. The argument. If your Windows is Windows 10 Version 1803 like here, OpenSSH Client has been implemented as a Windows feature, so it's possbile to authenticate with SSH Key-Pair without Putty and others. ssh [email protected] Add/change identity files by choosing them in file dialog; Add/edit port-forwarding options with graphical help. # Configure the SSH client software to establish a connection to the SSH server. vimrc config, a swap file left from your vim session's editing of /etc/ssh/sshd_config. On Windows systems, it is possible to generate your own SSH key pair by downloading and using an SSH client like PuTTY. ssh -l [email protected] host; ssh domain\[email protected]; ssh [email protected]@host; ssh [email protected] (works from v7. Connecting and configuring CVS with SSH. While it can be invoked by the ssh-add program, which will then load your decrypted keys into ssh-agent, the following instructions will, instead, configure x11-ssh-askpass to be invoked by the aforementioned Keychain script. If you do not intend to use keys, no additional configuration is required, besides linking libssh2 to Zabbix, if you're building from source. The SSH utility consists of a number of authentication mechanisms, such as password, keyboard-interactive, and public key. To enable SSH, you must tell the router which keypair to use. This has proven more secure over standard username/password authentication. Check the version. To do this you need to generate an SSH key: Check for existing SSH keys. Step 3: When prompted, press Enter to accept the default file name for your key. Many images have default ssh keys, which can be removed using ssh_deletekeys. To be sure everything is in place, type: "ps xa | grep sshd" and watch out for SSH jobs. Copy the public key from the client to the server. Then in the Key Generator window, check that the Type of key to generate at the bottom is set to SSH-2 RSA. AWS_DEFAULT_REGION; AWS_ACCESS_KEY_ID; AWS_SECRET_ACCESS_KEY; Input Variables. ssh/ directory. April 7, 2018 December 19, 2018 HuuPV Vagrant No Comment on Vagrant ssh key pair In this tutorial, I'm setup vagrant ssh key pair. Enter file in which to save the key (/root/. It is also used to transfer files from one computer to another computer over the network using secure copy (SCP) Protocol. This tutorial explains how you can replace password-based SSH authentication with key-based authentication which is more secure because only the people that own the key can log in. This becomes the password used to login. For OpenSSH clients this is configured in the ~/. On Windows systems, it is possible to generate your own SSH key pair by downloading and using an SSH client like PuTTY. Where “user” and “host” are the username and hostname, respectively, that you want to connect to. Recently we had a client whose Openstack configuration required us to use a SOCKSv5 proxy to access the Horizon Dashboard. removeDirectory('/. This folder is hidden and may not display in the file manager or finder unless configured to display hidden files and folders. ssh myvm The first time you sign in to a server using an SSH key, the command prompts you for. Client authentication keys are separate from server authentication keys (host keys). ssh && cat - >> ~/. Before, this was a pain to generate the SSH Keypair manually outside the itspaces and then upload it to the tenant. When the server is configured with the public key, the client can authenticate using the private key. ssh]$ /usr/bin/ssh-keygen -t rsa Generating public/private rsa key pair. But this time, for launch method, select the credential you created with the ssh key. NOTE that before you can configure SSH to allow public key authentication only, you need to first generate and copy the SSH keys for the user you intend to use for logging in with, lest you wont be able to copy the SSH keys nor login as that user thereafter. Here you can configure your SSH connections. Open the ssh_config file located globally at /etc/ssh/ssh_config or locally at ~/. The aim of post is to install git on Windowns and then configure it. 0 outside ssh timeout 15 ssh key-exchange group dh-group1-sha1. 58) as an example: 1) Run PuTTY. For example, you can use ssh-keygen (a tool provided with the standard OpenSSH installation) to create a key pair. Running ssh-add. Creating some advanced SSH configuration such as chrooted SFTP-only users 3. If the RSA public key does not exist on the switch, run the rsa local-key-pair create command. We will also show you how to set up an SSH key-based authentication and connect to your remote Linux servers without entering a password. Typically, there is only one SSH server running on a host, so it is easy to associate the Host Key with an individual HP-UX system. The steps and screenshot in this How-To were completed using the latest Firmware for that switch "N. This turns on forwarding on a case by case basis. If a configuration file is given on the command line, the system- wide configuration file (/etc/ssh/ssh_config) will be ignored. This works surprisingly well: Every new server you need to connect to, just add an alias to your. com" -f id_sshex. pub) by pressing Return. You specify the private key (. If you used a non-default file path for your GitLab SSH key pair, you must configure your SSH client to find your GitLab SSH private key for connections to your GitLab server (perhaps gitlab. Login in to a GCP VM instance with a SSH key file is actually an easy task. Configure public key authentication. PUB) file must be transferred to the client device's. More particularly, the reason to go by with SFTP is: it's secure, it allows a lot of files to transfer through it, it is just a matter of Key Swaps, connections, may be some IP whitelisting. In my case, I have a globally enabled ControlMaster in my ssh config. How can I use user data to replace a lost SSH key pair after the initial launch of my Amazon EC2 instance? Issue I want to use user data to replace a lost SSH key pair in an already launched Amazon Elastic Compute Cloud (Amazon EC2) instance. Configure SSH Server on Tiny Core Linux using openSSH Pradeep Singh | 18th Aug 2017 Tiny Core (Core) Linux doesn’t come with any default SSH Server, which means you can’t do ssh login if you wish to configure this incredibly sim operating system remotely. If your SSH client supports it, you can use public key authentication to log into Bitvise SSH Server. A SSH key pair can be created on the server side from the above screen, but it is not recommended due to the security issues involved in sending the private key and it's password to the client. The minimum value is 768 bytes and the default, if you do not use the flag, is 2048 bytes. Then in the Key Generator window, check that the Type of key to generate at the bottom is set to SSH-2 RSA. ssh/ directory. …And the private key is used…during the connection process to authenticate. The SSH utility consists of a number of authentication mechanisms, such as password, keyboard-interactive, and public key. To start this process, log on to your Ansible control server as the ansible user ( sudo -i -u ansible or su - ansible ). First, create the. Generating Your SSH Public Key Many Git servers authenticate using SSH public keys. Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. Follow these steps: Select Credentials, Manage Targets, SSH Key Pair Policies. Generates an RSA SSH key and saves to various public and private key file formats (OpenSSH and PuTTY). 58) as an example: 1) Run PuTTY. So if you search for ssh-console and you do not see a section of text like you see above, then the host key pair is still intact. ssh]$ /usr/bin/ssh-keygen -t rsa Generating public/private rsa key pair. Add the key to GitLab. You will need these keys in order to configure an SSH connection from your local computer to the server. To configure your GitHub account to use your new (or existing) SSH key, you'll also need to add it to your GitHub account. ssh/config file. Edit eider /etc/ssh/ssh_config witch effects all users on the system or ~/. I've created a custom ec2 ami image and trying to authenticate aws instance by using ec2 key pair authentication for a user USERVM by following below steps. ssh/config. It is possible to have multiple -i options (and multiple identities specified in configuration files). In order to properly configure a Windows client for authenticating via SSH keys, the public key (. SSH Configuration Packet Tracer Lab. Another popular option is to use PuTTYgen. In order to utilize RSA keys, you must first generate a public-private key pair using a tool such as ssh-keygen on a Linux-based system or a Mac, or a tool such as PuTTYGen on a Windows-based system. If not, uncomment it and restart the ssh service. I will also explain how to maintain those keys by changing their associated comments and more importantly by changing the passphrases using this handy utility. The possible values are "rsa1" for protocol version 1, and "dsa. ssh/authorized_keys file. Note: This is an RHCSA 7 exam objective and an RHCE 7 exam objective. If you do not want a password so that you can use this key pair for automating logons just press Enter twice. In AWS, when you launch any EC2 Linux instance, you should select a key pair for that particular instance. Well, it turns out that PSCP does support SSH key authentication. You will need these keys in order to configure an SSH connection from your local computer to the server. This will step you through the process of generating a SSH keypair on Mac OS X. So, in short, in need a way to configure a new router with exactly the same configuration as the one it is replacing, including ssh keys and passwords. In the following example, we told the router to use the previously created keypair and to use SSH v 2:. The first thing we are going to solve using this config file is to avoid having to add custom-named SSH keys using ssh-add. How can I use user data to replace a lost SSH key pair after the initial launch of my Amazon EC2 instance? Issue I want to use user data to replace a lost SSH key pair in an already launched Amazon Elastic Compute Cloud (Amazon EC2) instance. SSH is a widely-used secure console connection to a remote linux server. Managing OpenStack instances with Ansible through an SSH bastion host. Okay, thats what ssh-agent is for. With SSH, the configuration management server initiates an SSH session with the device running Junos OS. At the shell prompt, type the following command: ssh-keygen -t rsa The ssh-keygen program will prompt you for the location of the key file. Move your mouse in the area below the progress bar. Add/change identity files by choosing them in file dialog; Add/edit port-forwarding options with graphical help. Or you can use an IP address: ssh [email protected] chmod 400 ec2-keypair. Different methods can be used to authenticate, depending on the level of functionality and security you want. One assumption is that the Windows profile you are using is set up with administrative privileges. Ipswitch Community. Verification: To verify, we can SSH own IP (192. Now this was the normal way of logging in but being a password system it is open to brute force attacks. If you haven’t already created a key-pair, do so now. Getting Started; First, install OpenSSH on two UNIX machines, hurly and burly. Two keys are created: one public and the other private. 0+-t rsa1 # DEEMED INSECURE - has weaknesses and shouldn't be used (used in protocol 1)-b 4096 # bit size-a. Configure public key authentication. All new connections will use forwarding. Stored private key under ~/. R2(config)# crypto key generate rsa usage-keys label {keypair-name} modulus 768. generate_signing_key (bool: true) - Specifies if Vault should generate the signing key pair internally. The SSH protocol also allows the ASA to identify itself via its host key. Create a Key Pair on Your Computer Linux and MacOS X. If you see this message, create a directory named “empty” by using following commands:. If your Windows is Windows 10 Version 1803 like here, OpenSSH Client has been implemented as a Windows feature, so it's possbile to authenticate with SSH Key-Pair without Putty and others. Open git-bash and generate ssh keys inside above directory using ssh-keygen. …Passwords can be stolen, or guessed,…but a cryptographic key file…is a little bit easier to secure. Security groups are sets of IP filter rules that define networking access and are applied to all instances within a project. Setting up Ansible, SSH to configure AWS EC2 instances We pick up with our ansible tutorial to focus on this AWS ansible tutorial on how to use ansible with EC2 as well as mastering ansible inventory setup, ssh-agent redux and covering ssh client config so you don't have to have long convoluted scripts and have to remember the id file, username, etc. To do so, open the /etc/ssh/sshd_config configuration file in a text editor such as vi or nano, and change the PasswordAuthentication option as follows: PasswordAuthentication no To be able to use ssh , scp , or sftp to connect to the server from a client machine, generate an authorization key pair by following the steps below. The following are tips for both the Secure Shell daemon (server) and the SSH command line client inlcuded with Mac OS X. Generating a key pair. $ alias dev = 'ssh [email protected] If setting up an SSH server, do not turn off the Privilege Separation feature by using the UsePrivilegeSeparation no directive in the /etc/ssh/sshd_config file. You specify the private key (. We're now going to login to GCP VM instance with a SSH key file we created in earlier tutorial. Typical ssh usage is one keypair per account per machine (or one keypair per type, e. The session key is negotiated during the connection and then used with a symmetric encryption algorithm and a message authentication code algorithm to protect the data. How to generate Gitlab ssh key for your account. The configuration of the SSH Daemon is found in the sshd_config file, often stored in the /etc/ssh/ directory. ssh/config file using the IdentityFile option. How to Import SSH Key Pair from Vendor. you normally generate your public/private key pair on your client and then copy the public key to the ~/. This is a technology based on public-key cryptography. SSH uses public key cryptography to authenticate remote user. A better option is to use a key pair. Make Powershell, SSH Github and Git Suck Less on Windows. Also, the switch maintains the key pair across reboots, including power cycles. Digital Ocean, a Virtual Private Server (VPS) provider, has this advice on how you should log into their Droplets: "you should use public key authentication. It supports a variety of devices that run the SVC operating system. To do so, open the /etc/ssh/sshd_config configuration file in a text editor such as vi or nano, and change the PasswordAuthentication option as follows: PasswordAuthentication no To be able to use ssh , scp , or sftp to connect to the server from a client machine, generate an authorization key pair by following the steps below. Amazon EC2 SSH Configuration. Once the public key authentication scheme is ready to use in real practice, you may consider disable the classic password authentication by changing /etc/sshd_config:in SSH server:. To enable a password authentication, you create a password, update the /etc/ssh/sshd_config file, and then restart the SSH service. generate_signing_key (bool: true) - Specifies if Vault should generate the signing key pair internally. For example, ssh [email protected] Understanding public key authentication. Transfer the secret key to your Windows 10 and put it uder the [(logon user home). PasswordAuthentication yes. Login in to a GCP VM instance with a SSH key file is actually an easy task. I assume you already have Ansible and the OpenStack CLI tools installed. Follow the steps to configure SSH. generate_signing_key (bool: true) - Specifies if Vault should generate the signing key pair internally. It can also be used for creating secure tunnels, somewhat akin to Virtual Private Networks, and for use as a network file system. This section describes how to use an SSH key pair to log on to a Linux instance on a Linux OS or an OS supporting SSH commands, for example, Windows MobaXterm. The client supports both the SSH1 and SSH2 protocol versions. In the following article, we're going to run through the process of creating a public/private SSH key-pair in OS X 10. Move your mouse to the appropriate area of the. A SSH key pair can be created on the server side from the above screen, but it is not recommended due to the security issues involved in sending the private key and it's password to the client. This tutorial explains how to generate SSH keys on CentOS 7 systems. A lost or compromised SSH keypair can be changed, and the user can access the VM by using the new keypair. Generate a ssh key and disable password authentication on Ubuntu server 21 Replies Update: There is now an updated version of this guide for Ubuntu 12. pem file extension But if you are using PuTTY on your Windows laptop to login to AWS instance, you have a problem. 0 of the SSH protocol. 2 Simple Steps to Set Up Passwordless SSH Login Step 1: Generate a Public/Private Keypair on Your Ubuntu Desktop On your Ubuntu desktop (not your server), enter the following command in a terminal window. ssh directory in your home directory ) You will probably have to put your public key somewhere in the /boot/config directory and have the go script copy the key into the users home directory so it will persist after a reboot. Adding a new SSH key to your GitHub account. See below ; Creatint a Private/Public SSH Key Pair on Tux. ssh/idrsa, then SSH will be able to find it automatically. To configure your GitHub account to use your new (or existing) SSH key, you'll also need to add it to your GitHub account. You want to use Linux and OpenSSH to automate your tasks. If your RSA key has a strong passphrase, it might take your attacker a few hours to guess by brute force. Git configuration. Use Putty and SSH key pair to connect. Where “user” and “host” are the username and hostname, respectively, that you want to connect to. You will see three tabs to the right of the selected user account. Not all nodes need to be configured if you don’t want them all to be proxies. Ssh is now enabled and you will be able to connect with your ssh client. scp and rsync). End with the character 'X'. Citrix recommends that you use the console for changes relating to the SSH daemon. Generating public/private rsa key pair. First you need to generate an SSH key pair for. Removing the global ControlMaster config and deleting the github ssh socket (which in my case, is stored in /tmp as ssh_hostname. Credential Manager can generate SSH key pairs for provisioning access to UNIX devices that use them. RSA is the most common kind of keypair generation. Here's a nice intro about SSH Keys written by DigitalOcean on their How-To guides: How to Setup SSH Keys and How to Configure SSH Key based authentication on a Linux Server: Secure Shell (better known as SSH) is a cryptographic network protocol which allows users to securely perform a number of network services over an unsecured network. I came across a feature in capistrano to use local machine's key pair for pulling updates to server, which is ssh_options[:forward_agent] = true. sshd_config. You can generate a keypair with:. Just copy the private key file to ~/. What is PuTTY? PuTTY is an SSH client for logging in to remote servers from your local Windows PC. The SSH key of the parent server or proxy is retrieved to authorize it on the proxy. SSH can handle authentication using a traditional username and password combination or by using a public and private key pair. In this step you will configure Artifactory's SSH authentication parameters. If SSH is selected, UltraEdit/UEStudio will only connect with the SECURE SHELL protocol. You want to use Linux and OpenSSH to automate your tasks. Server stores the public key. how to setup ssh server on kali linux - using putty To finish up learning how to setup SSH server on Kali Linux you need to open up Putty that you should have already downloaded. To do so, open the /etc/ssh/sshd_config configuration file in a text editor such as vi or nano, and change the PasswordAuthentication option as follows: PasswordAuthentication no To be able to use ssh , scp , or sftp to connect to the server from a client machine, generate an authorization key pair by following the steps below. First, create the SSH directory and then generate the SSH key pair. … The file ~/. Automatically use correct SSH key for remote Git repo 2013-10-07 If you have more than one GitHub account, or push to remote repositories using various accounts, it's handy if the correct SSH key will automatically be used for the project you are working on. The first one is called ssh-keygen and it is used to create your keypair. How do I generate my own SSH key pair? Background Information Servers that support Server Login Control populate their SSH authorized-keys file with multiple trusted keys based on policy received from the RightScale Dashboard, typically inserting one public key per user with server_login permission. Click the Keygen button at the bottom of the PuTTY Configuration window to get started. See below ; Creatint a Private/Public SSH Key Pair on Tux. ssh/config file, see Working with non-default SSH key pair paths for more information. This means that you don't have to "create a key" when you configure your SSH server to also be used as SFTP: the server already has a key. The ssh keypair has a passphrase but that is not the same thing as the account password. 04 machines. Public key authentication is an alternative means of identifying yourself to a login server, instead of typing a password. Configuration. Create an SSH Key. This example contains IP addresses and public and private keys that do not apply to your configuration, but are included for example purposes only. To use public key authentication, the first step is to generate a pair of private and public keys on the Linux side. Generating Your SSH Public Key Many Git servers authenticate using SSH public keys. F ollow the first 3 steps we did for slave configuration using username and password. This means that you don't have to "create a key" when you configure your SSH server to also be used as SFTP: the server already has a key. The Router ignored the Key Pair as SSH was disabled. The user must generate a private/public key pair on the client and configure a public key on the Cisco IOS SSH server to complete the authentication. Make sure that you use the correct attributes for the connector you are using. The session key is negotiated during the connection and then used with a symmetric encryption algorithm and a message authentication code algorithm to protect the data. With an ssh-agent, you don't have to type the password for your private key every time you SSH to a server. This will step you through the process of generating a SSH keypair on Mac OS X. Restore the default SSH key pair. If you do not intend to use keys, no additional configuration is required, besides linking libssh2 to Zabbix, if you're building from source. SSH Config and crypto key generate RSA command. When the TTSSH module is installed, Tera Term supports the SSH connection. The ssh command is based on ssh config changes from previous article, and it uses the “-i” switch to instruct ssh client what private key to use. SSH keys can be used to increase the level of security for a user remotely authenticating to a Linux server through SSH. How can I setup ssh to login without having to type the password? You must first generate what is known as a key pair, then copy the public key to your server. Then creating the root keys is simpler, than creating the SSH-keys for other non-root users. 0, however i believe it defaults the key tied to my id. Select the. This is generally the default on most new versions of OpenSSH. Move that file into your ~/. SSH key pairs are two cryptographically secure keys that can be used to authenticate a client to an SSH server. The virtual machine can be running on the host or on a remote server running Workstation Pro, VMware ESXi, or VMware vCenter Server. Installing OpenSSH Server on Debian 10. To enable SSH, you must tell the router which keypair to use. We need use this key to connect to your instance using the default user, at which point we will create a new custom user. com" -f id_sshex. The SSH key of the parent server or proxy is retrieved to authorize it on the proxy. This guide describes how to generate and use a private/public key pair to log in to a remote system with SSH using PuTTY. Description of SSH connection which is a feature of Tera Term. Otherwise you won't be able to configure SSH. If you can login to your account using SSH without a password, you have successfully set up SSH key-based authentication. The below steps will show how to generate a SSH key, add it to the router, and then disable password authentication so that only the key-pair can be used to login. When using SSH public/private key authentication, a user needs to generate a public/private key pair on his workstation. Over the last two years I’ve ended up creating a large collection of websites and web applications on. You would like to configure the client to automatically provide the private key passphrase when needed so that you do not need to type the passphrase for every new SSH connection to a server. X11Forwarding yes. SSH Config Editor is a handy tool for manage your OpenSSH client-configuration file. This is a text file which is relatively easy to read; we'll be looking for two entries to modify. Working with non-default SSH key pair paths. Version 2 is more secure and commonly used. The older SSH-1 was. x11-ssh-askpass depends only on the libx11 and libxt libraries, and the appearance of x11-ssh-askpass is customizable. To enable SSH compression: Click Settings in the top right of the repository window. In SSH, the public key cryptography is used in both directions (client to server and server to client. Common things that go wrong: your permissions are wrong, selinux contexts are wrong, the file contents are malformed due to cut and paste errors. Once you open the tool, you can generate a new pair of SSH keys. ssh/config and create a couple. The public key will be added to your node. Now on the Windows machine in C:\Program Files\OpenSSH\sshd_config verify that this line is uncommented, which it should be by default. Configure SSH Key-Pair Authentication. Public keys, in the way they are commonly used in SSH, are not X. In the GCP Console, go to the VM Instances page. On SSH1 implementations you will see one key pair per hostname. It provides a text-only interface and spawns a remote shell in the server which is previously defined in the user creation process but it's usually /bin/bash or /bin/sh. Create directory to hold ssh keys that will be generated during following steps. Generating ssh key with vagrant_rsa is private key and vagrant_rsa. Unfuddle uses public key cryptography to authenticate all access to Git repositories over SSH. ssh/config file. Create a Key Pair on Your Computer Linux and MacOS X. Create a new file: ~/. SSH RSA Keypair on the Cisco ASA. As such, I needed an alternative way to authenticate. After entering the passphrase, I am logged in. Just create or register a new keypair, then call resetSSHKeyForVirtualMachine. Now this was the normal way of logging in but being a password system it is open to brute force attacks. R2(config)#ip ssh rsa key-pair name {key-pair name} By doing so SSH version 1. This example uses the vim text editor. Description: The goal of this tutorial is to setup your ssh access to the IoT-LAB servers. Here we can use PuTTYgen to create a private/public key pair. To logon via SSH key authentication, you must first generate a key pair. typically using password authentication. Press Return to accept the defaults. The SFTP (SSH File Transfer Protocol) is probably the most widely used secure file transfer protocol that runs over SSH. This is a technology based on public-key cryptography. To demonstrate SSH, I will use the following topology:. You can generate a keypair with:. Skip this for now. This first key pair is your default SSH identity. When importing an existing key pair the public key material may be in any format supported by AWS. SSH keys can be used to increase the level of security for a user remotely authenticating to a Linux server through SSH. Run the following command:. If your SSH client supports it, you can use public key authentication to log into Bitvise SSH Server. Environment Variables.