536 : Data connection protection `level` not supported

Explanation

The PROT command requested a data protection level that is not supported. The request to set the level is rejected.

level is one of the following ones:

clear
private
safe
confidential

The support by the FTP server for these levels is determined by the value specified on the SECURE_DATACONN statement in the FTP.DATA file for the server. SECURE_DATACONN specifies the minimum level of security allowed for the data connection.

PROT C is rejected if SECURE_DATACONN has a value of SAFE or PRIVATE.

PROT S is rejected if SECURE_DATACONN has a value of PRIVATE or NEVER. Also, it is rejected if the security mechanism is TLS.

PROT P is rejected if SECURE_DATACONN has a value of NEVER.

PROT E is always rejected.

System action

FTP continues.

User response

None.