Though a simple owncloud user can upload a file on an owncloud hosted on a synology box.
He or she may not be able to download that file. Firefox will complain by saying it can’t find that file.
There is a simple fix for that on Synology DSM 5.
All one would need to do is to include: XSendFilePath /volume1 on /etc/httpd/conf/extra/mod_xsendfile.conf-user
Such that mod_xsendfile.conf-user reads like this:
LoadModule xsendfile_module modules/mod_xsendfile.so XSendFile on XSendFilePath /var/services/web /var/services/homes SetEnv MOD_X_SENDFILE_ENABLED yes XSendFilePath /volume1
The http server can be restarted with
$ httpd -k restart