You can use Password, Public Key, or both authentication methods for SSH2 connections. Password authentication is the default.
On the menu bar, click Tools > Global Options.
Expand Security.
Click SSH2 security.
Make sure the Use password authentication check box is selected. You are using password authentication whenever the check box is selected, even if the box and check are dimmed.
Click OK.
On the menu bar, click Tools > Global Options.
Expand Security.
Click SSH2.
Select the Use public key authentication check box. You are using public key authentication whenever the check box is selected, even if the box and check are dimmed.
Click OK.
To use public key authentication, you will need to send your public key to the server administrator before making an SSH2 connection.