This option is directly passed to ssh. With this you cannot use rhosts or rsarhosts authentications, but it can be used to bypass some firewalls that dont allow privileged source ports to pass. Causes scp and ssh to print debugging messages about their progress. This is helpful in debugging connection, authentication, and configura- tion problems. Passes the -C flag to ssh to enable compression.
P port Specifies the port to connect to on the remote host.
Note that this option is written with a capital P, because -p is already reserved for preserving the times and modes of the file in rcp. The default value of the statistics can be set when the ssh is configured. Next the scp checks those environment variables and after that command line options.