This instruction is based on two following sites: http://www.linuxproblem.org/art_9.html http://teanazar.com/2015/10/securing-wdmycloud-ssh-ftp-remote-access/
Secure and Harden Root Access
First thing first, change the wdmycloud default root password.The default password is welc0me. The least you can do is to change this one to something more reasonable. If you were to monitor the incoming request especially to the SSH port 22 alone, you’ll be shocked to see lots of ...