rstash is a server and client for transferring
files over a network into file drop boxes on the
server. It is primarily aimed at transferring
things such as backup files from one host to
another without opening up complete shell
accounts, NFS, FTP, or other full file transfer
mechanisms. The server has a set of boxes into
which the client can put named files in a
write-only fashion. No access to any portions of
the server's file system outside the configured
drop boxes is permitted.