Passwordless logins by ssh-keys
Rsync Buddy utilizes user set ssh keypath and identityfile. Default values for ssh are ~/.ssh/id_rsa and portnumber 22. It is not required to set your own values for key path and identityfile if default values are used. The ssh parameter within the rsync command is, if set by the user: -e “ssh -i ~/.ssh_keypath/identityfile -p NN” where -i ~/.ssh_keypath/identityfile is the ssh keypath and identityfile and -p NN is the port number ssh communicates through, default port 22
Rsync daemon setup
Rsync Buddy does not support a rsync daemon setup. Passwordless connections is by ssh-keys. But you might get it to work by following this guide. With a few tweaks it is possible to get Rsync Buddy working with rsync daemon. Be aware of not utilizing ssh, transfer of data is not encrypted. This is might not a problem on a local network, but I would not advise it on a public network. Also be aware of snapshot is not possible with a rsync daemon setup.
SSH settings
In this view you can let Rsync Buddy assist in creating ssh-keys and setup global ssh keypath and identityfile, either utilizing default values or set your own. There is some more info about ssh. Local ssh keys found If on Rsync Buddy has found local ssh keys. Default values for ssh are ~/.ssh/id_rsa and portnumber 22. It is not required to set your own values for key path and identityfile if default values are used.