504 : Server does not understand the specified mechanism

Explanation

The AUTH command specified a security mechanism name that is too long for the FTP server to process. The security mechanism names supported by the FTP server are GSSAPI and TLS. TLS support can also be requested with a mechanism name of TLS-C, TLS-P, or SSL.

System action

FTP continues.

User response

Reissue the AUTH command with one of the supported security mechanism names.

System programmer response

None