Use the TLSMECHANISM statement to specify whether TLS is implemented by AT-TLS or by FTP. AT-TLS is the preferred method for implementing TLS.
.-TLSMECHANISM FTP--------. >>-+-------------------------+--------------------------------->< '-TLSMECHANISM--+-FTP---+-' '-ATTLS-'
Requirement: The KEYRING statement is required if secure mechanism TLS is defined by FTP.
Requirement: AT-TLS must be configured in the TCPIP stack. See z/OS Communications Server: IP Configuration Guide for more information.
Restriction: The KEYRING, CIPHERSUITE, and TLSTIMEOUT statements are ignored when using AT-TLS.
TLSMECHANISM FTP