cisco 2511 file transfer through firewall.

["Steven E. Matkoski" <matkoski @ dreamscape . com>]

I am trying to set up a dial-in service for our company and would like
to know how to handle file transfers between a terminal server and the
firewall. Here is the layout: I have 4 cisco 2511's connected to the
perimeter network (ethernet), which is attached to my firewall. I have
to support async file transfers (X,Y,Z modem) to a ftp server within 
the secure network, how do terminal servers handle such transfers? 
do they convert to ftp? I dont know which ports to open for these
transfers. Any help is appreciated.

-- 

Thanks!
-steve.
matkoski @
 dreamscape .
 com