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Once the SSH connection is established, this method will attempt one of two possible authentication types, based on the accepted authentications of the remote host:

=over 4

=item *

B<Publickey authentication> : If the remote host accepts it and the method was supplied with public/private keys. The public/private keys need to be in OpenSSH format. If the private key is protected by a passphrase then this must also be provided or...

=item *

B<Password authentication> : If the remote host accepts either 'password' or 'keyboard-interactive' authentication methods. A password must be provided or, if prompt_credentials is true, this method will prompt for the password. If password authentic...

=back

There are some devices, with a crude SSH implementation, which will accept an SSH connection without any SSH authentication, and then perform an interactive login, like Telnet does. In this case, the connect() method, will not perform any SSH authent...

The optional "prompt_credentials" argument is provided to override the global setting of the parameter by the same name which is by default false. See prompt_credentials().

If a code reference is provided via the 'callback' argument, that code will be called immediately after setting up the SSH connection and before attempting any authentication. You can use this callback to check the key of the remote host against a li...
An example on how to verify the host key against your known hosts is provided in the documentation of Net::SSH2::KnownHosts.
Note that Net::SSH2 methods remote_hostkey and known_hosts methods only exists as of version 0.54. This class does not require a minimum version of Net::SSH2 but your code will need to require a version of 0.54, or verify the availability of those me...