Authentication
If the server you are attempting to contact requires authentication, you will need to supply a username and password. If you receive an "Bad Credentials" error from the server, check that you have entered the correct username and password and that you are authorized to access the files and directories you have chosen.

Your authentication credentials will determine your access rights to the files on the server. If you receive "Permission Denied" errors, it may indicate that the given username does not have access to a particular file.
The username and password are always encrypted when communicating with the server, even if the "Encryption" checkbox is unchecked.
Windows Domains
If the server is running on a Windows system with Active Directory or LDAP enabled, you may specify an authentication domain after your username by using the following syntax:
username@windomain
This should only be done for Windows servers which require explicit domains for authentication.