use chroot
If ???use chroot??? is true, the rsync daemon will chroot to
the
???path??? before starting the file transfer with the client.
This
has the advantage of extra protection against possible implemen???
tation security holes, but it has the disadvantages of requiring
super-user privileges, of not being able to follow symbolic
links that are either absolute or outside of the new root path,
and later:
hierarchy. The default for ???use chroot??? is true, and is
the
safer choice (especially if the module is not read-only).
This feature is activated if you run rsync in daemon mode, which seems
to agree with your results.