Ssh-hostkey

1. What is an SSH HostKey?
2. What is a SSH public key?
3. Where is SSH host stored?
4. What is a Hostkey in SFTP?
5. What is stored in known_hosts?
6. Is Ed25519 better than RSA?
7. How do I get WinSCP Hostkey?
8. Where can I find SSH key?
9. Where is known_hosts?
10. What is the purpose of the SSH Known_hosts file?

What is an SSH HostKey?

A host key is a cryptographic key used for authenticating computers in the SSH protocol. Host keys are key pairs, typically using the RSA, DSA, or ECDSA algorithms. Public host keys are stored on and/or distributed to SSH clients, and private keys are stored on SSH servers.

What is a SSH public key?

The SSH public key is used by both the user and the remote server and is used to encrypt messages. On the remote server side, the public key is saved in a file that contains a list of all authorized public keys. On the user's side, the public key is stored in SSH key management software or in a file on their computer.

Where is SSH host stored?

SSH host keys are stored in /etc/ssh/ , which you generally do not need to choose. These keys were generated when the openssh-server package was installed. You can list the fingerprint of the keys by ssh-keygen -l -f /etc/ssh/ssh_host_key.

What is a Hostkey in SFTP?

A host key is the SFTP server's public key. Ensuring the SFTP server is validated is an important aspect of the SFTP protocol. It is designed to protect against man-in-the-middle attacks where the hacker intercepts and relays an impersonated message to the other party.

What is stored in known_hosts?

ssh/known_hosts file contains the SSH fingerprints of machines you've logged into. These fingerprints are generated from the remote server's SSH key. ... When you answer yes to this question, the remote host fingerprint is then saved to the known_hosts file. That key will appear as a random string of characters.

Is Ed25519 better than RSA?

Ed25519 is probably the strongest mathematically (and also the fastest), but not yet widely supported. At least 256 bits long. RSA is the best bet if you can't use Ed25519. At least 3072 bits long.

How do I get WinSCP Hostkey?

If you already have verified the host key for your GUI session, go to a Server and Protocol Information Dialog and see a Server Host key Fingerprint box. You can have WinSCP generate the script or code for you, including the -hostkey switch or SessionOptions.

Where can I find SSH key?

By default, the keys will be stored in the ~/. ssh directory within your user's home directory. The private key will be called id_rsa and the associated public key will be called id_rsa.

Where is known_hosts?

On a Mac or Linux machine – the known_hosts file is located in the . ssh/known_hosts directory.

What is the purpose of the SSH Known_hosts file?

The known_hosts file is for verifying the identity of other systems. ssh(1) can automatically add keys to the user's file, but they can be added manually as well. The file contains a list of public keys for all the hosts which the user has connected to.