You mean FTP&#x2F;S aka RFC4217?  You ain&#x27;t kidding about being a nasty hack.  When it recently came up in my world, the only place it seemed to be really well supported was in the AS&#x2F;400 world, where IBM seems to have standardized on it.  Everywhere else there seemed to be any number of weirdnesses, incompatibilities and decrepit features.  YMMV.