1. 989 for the FTPS data channel
  2. implicit FTPS was expected to listen on the IANA Well Known Port 990/TCP for the FTPS control channel
  3. (65515 to 65535) are needed to open for FTPS for the return ports

Need to open the ports.

More info please reference: http://en.wikipedia.org/wiki/FTPS

05-26 21:19