The server is authenticated with a digital signature based on an RSA, DSA, ECDSA or Ed25519 public-key algorithm.

During the server installation process, one RSA key pair (with the file names hostkey and hostkey.pub) is generated and stored on the server host in directory /etc/ssh2. By default, this key pair is used for server authentication.

For information on connecting to a remote server for the first time, see Chapter 3.