If you are using an ssh outbound only firewall rule that is reasonable usage. What type of data, is it binary? database dumps? text?
A strict rsf share on the outside box to the inside box with the rfs port open on the fw then cron cp's the data to the rfs drive that is mounted to the inside box. Not in place of your solution which is reasonable but as an alternative. Also nfs over ssh would do the same thing and would not really require a login of any sort. rfs is more secure though. Oracle over ssh is also useful if you have databases out there.
thanx,
bill