Answering my own question in case others need a response....I ran a test this afternoon to a directory on the vps and it looks like it worked. It sounds as though rtrr is a form (or renamed) version of ftp that qnap uses.
the test i did today was a manual start of an rtrr process configured on our nas. I'll find out tonight if the automatic one works.
so to answer my question, yes, it looks like it works...
