can you recommend a
FTP server which
- and runs on Windows or Linux or BSD
MODE C is different from
MODE Z (ZLIB). Most FTP servers on *nix and windows does support mode Z. However I'm aware of only one FTP server which supports MODE C and it runs only IBM Z/OS (successor of OS/390) on IBM Mainframes.
For details on MODE C see http://www.faqs.org/rfcs/rfc959.html section 3.4.3