SECOpen (Setting Data Security Protection)

The SECOpen i5/OS^® FTP client subcommand opens a secure control connection to an FTP server using the specified security option.

SECOpen systemname [portnumber] [security_option ]

SOpen is a synonym for SECOPEN.

systemname: Enter the name or Internet address of the remote system.
portnumber: Enter the port number for this connection.

Notes:

If this parameter is omitted and (SSL is specified, the port number 21 will be used.
If this parameter is omitted and (IMPLICIT is specified, then port number 990 is used.
If both the port number and the security_option are omitted, then port number 21 and (SSL are assumed.

security_option

Specify the type of security to be used.

(SSL

Uses a secure SSL connection to the FTP server. The AUTH (Authorization) server subcommand is used when making the connection.

(IMPLICIT

Uses an implicit SSL or TLS secure connection to the FTP server. An implicit SSL connection is made without sending the AUTH, PBSZ, and PROT server subcommands to the FTP server. In this case, the FTP server must be configured to expect an SSL/TLS connection negotiation to occur for the specified port number.

For the implicit SSL case, the FTP server acts in the same way as if the client has sent these subcommands with the parameters shown as follows:

AUTH SSL
PBSZ 0
PROT P
e

If the security_options parameter is not specified, then (SSL will be assumed. When the port number used is 990, then (IMPLICIT is assumed.