I would like to turn off password authentication for SSH to my server, using keys instead. I don't see an option in Filezilla to use a public key though: is this not a feature of the SFTP spec?

Sftp doesn't use ssl certs like ftps (unless there is some proprietary addition to the sftp server)<BR><BR>Maybe you mean an ssh public key? WinSCP looks to support them as well as all the other ...