One of my clients has an environment with a Cisco ASA 5500 series fw as the outward facing endpoint, a DMZ with reverse proxy server in it and an inside network with multiple web servers running. All is working well - customers connect to the websites hosted on the RP server and this retrieves data from the inside web servers as you would expect (configured with URL rewrite to assist).
They would now like to introduce a FTP server on the inside network and make this accessible through the reverse proxy - and I am a bit stumped. URL-rewrite, a key component in getting the RP to operate, does not seem to support a FTP server. My client has little interest in moving away from MS server technologies for this and I am not sure how to proceed. Any advice would be gratefully received.