534: TLS negotiation failed -- data connection closed

Explanation

The FTP client and server failed during the negotiation step (also known as the handshake) to protect a data connection with the TLS mechanism.

System action

The command that was being processed failed. FTP continues.

User response

Activate the FTP client and server traces as follows:

SITE DEBUG=(NONE,ACC,SOC(2))
DEBUG NONE ACC SOC(2)

Try the command again and contact the system programmer with the error message.

If you are not allowed to issue the SITE command to change the server trace options, ask the system programmer to set the options, close the session to the server, enter FTP again and try the failing subcommand.

System programmer response

Use the FTP client and server traces to determine the cause of the error and correct the problem.