I neglected to mention that authentication for my backups is normally in the form of passwords (contained in duply's config file). I don't use public-key authentication for my backups, although I do use it for all other SSH purposes.
.....Ron -- Ron Murray <r...@rjmx.net> PGP Fingerprint: 0ED0 C1D1 615C FCCE 7424 9B27 31D8 AED5 AF6D 0D4A