ftp question

[redhat]

I have a windows computer that ftp's data to a Linux box on the inside
(trusted) side of our network.  I need to ftp that information from that
Linux box to another Linux box that is in our DMZ.  Is there a way to
automate this function using cron?  Is there a better method?  The file
is updated every 5 minutes from the windows computer and I would like to
make this happen every 5-10 minutes.
thanks,
DF