-moved post to correct topic area
Is the FTP initialized from the AirWave server? Or is it an inbound request from a device to the AirWave server? AirWave can also be an FTP server, but that's only used if devices are trying to get firmware updates from AirWave. RAPIDS should not be doing anything FTP related.
I also suggest taking this up as a support case with TAC. Along with a tcpdump capture of all traffic between your APC and the AirWave server.