Possible values that you can specify include the following: dsa, ecdsa, ed25519, and rsa.įor security, in case an attacker gains access to your private key, you can specify a passphrase to encrypt your private key. To create an SSH key pair by using an algorithm other than the default RSA algorithm, use the -t option. Your identification has been saved in /home/guest/.ssh/id_rsa. To create a public and private SSH2 RSA key pair: ssh-keygen Generating public/private rsa key pair.Įnter file in which to save the key (/home/guest/.ssh/id_rsa): Įnter passphrase (empty for no passphrase): password Untrusted or heavily shared bastion host. Or use the ProxyJump command option where you may need to connect to another system through an Instead, you can use SSH Agent to remember a key passphrase for the duration of a login session.Ĭonsider using SSH Agent Forwarding to connect from trusted system to trusted system, However, using a key without a passphrase can be poor security practice. Key pairs that do not have passphrases, can help with scripted automation as they can access remote systems instantly and you avoid having to enter your passphrase each time you connect. When generating key pairs, you can either configure them to have a password or not. For security, avoid copying your private key to multiple locations. You can store your private key safely on a single client that you use to access the servers. Then to connect to the server, you provide your matching private key. Once you have a key pair, you copy the public key to any server that you want to connect to. Refer to your client softwareĭocumentation if you are unsure about key format. For example, keys generated using the PuTTY ssh client software are not directlyĬompatible with OpenSSH and may need to be converted before use. Not all key pairs are compatible with OpenSSH and you may need to convert keys as Have been compromised or when using a key to access systems with different encryption Only generate an SSH key pair once and only change the key pair if it may You can either use an existing key pair or generate a new one. If you want to access your VPS from outside the Customer Portal (using any SSH client like OpenSSH ( ) or PuTTY ( )), you need to associate the generated SSH Key to the VPS.To use key authentication, you must first have a key pair: a public key and a corresponding Please refer to AUTHORIZED_KEYS FILE FORMAT section in the manual page for the OpenSSH server for a description of exact syntax of the " from=" option and the additional options. A good security precaution to mitigate the risk of a compromised private key is to add the " from=" option to restrict from which hosts/ip-addresses can be logged in. The " options" field can be used to place or lift restrictions on what can be done when that specific public key is used to access your virtual server. Pro tip: SSH2 public keys have the format of a single line with the fields: " options" " key-type" " base64-encoded public_key" " comment" where the " options" field is optional and typically omitted as seen in the screenshot above. The SSH key is generated and provides a fingerprint (short way to identify the long Public key). ![]() Enter the name of the SSH key and the Public key, and click Submit.On the Overview page, select Access tab and click Add SSH key.Click on a VPS and click on Manage VPS, to go to the management page.To register an SSH key, login to the Customer Portal and choose VPS.Perform the following steps to register an SSH key: If you register your SSH key with your VPS, you will be able to connect to your servers using any SSH client like OpenSSH ( ) or PuTTY ( ). This allows you to log in to your servers in a secure way without the need to use any password. The SSH Public key can be shared with those systems you want to access to. For detailed instructions about manually generating your SSH keys in Windows, please see the PuTTY tutorial. ![]() Linux or OSX systems ssh-keygen -t rsa -b 2048 Windows systems Creating/generating an SSH key for an instanceĭepending on your operating system, there are different ways in which you can create/generate an SSH key pair.
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