errFatal(local.RegisterSingleHandler(handlerTest, func(payload []byte) ([]byte, *RemoteErr) {
		t.Log("1: server payload: ", len(payload), "bytes.")
		return append([]byte{}, payload...), nil
	}))
	// 2: Return as error
	errFatal(local.RegisterSingleHandler(handlerTest2, func(payload []byte) ([]byte, *RemoteErr) {
		t.Log("2: server payload: ", len(payload), "bytes.")
		err := RemoteErr(payload)
		return nil, &err
	}))

```

### TLS (FTP)

Unlike SFTP server, FTP server is insecure by default. To operate under TLS mode, you need to provide certificates via

```
--ftp="tls-private-key=path/to/private.key" --ftp="tls-public-cert=path/to/public.crt"
```

> NOTE: if MinIO distributed setup is already configured to run under TLS, FTP will automatically use the relevant

	consoleapi.GlobalMinIOConfig = consoleapi.MinIOConfig{
		OpenIDProviders: buildOpenIDConsoleConfig(),
	}

	server := consoleapi.NewServer(api)
	// register all APIs
	server.ConfigureAPI()

	consolePort, _ := strconv.Atoi(globalMinioConsolePort)

	server.Host = globalMinioConsoleHost
	server.Port = consolePort
	consoleapi.Port = globalMinioConsolePort
	consoleapi.Hostname = globalMinioConsoleHost

	online
	closed
)

// NetworkError - error type in case of errors related to http/transport
// for ex. connection refused, connection reset, dns resolution failure etc.
// All errors returned by storage-rest-server (ex errFileNotFound, errDiskNotFound) are not considered to be network errors.
type NetworkError struct {
	Err error
}

func (n *NetworkError) Error() string {
	return n.Err.Error()
}

		},
		config.PolicyOPASubSys: {
			Key:         config.PolicyOPASubSys,
			Description: "[DEPRECATED - use `policy_plugin` instead] enable external OPA for policy enforcement",
		},
	}

	config.RegisterHelpDeprecatedSubSys(deprecatedHelpKVMap)
}

var (
	// globalServerConfig server config.
	globalServerConfig   config.Config

	// return 503 server closed error, consider it as an offline node
	case strings.Contains(err.Error(), http.ErrServerClosed.Error()):
		return true
	// Corner case, the server closed the connection with a keep-alive timeout
	// some requests are not retried internally, such as POST request with written body
	case strings.Contains(err.Error(), "server closed idle connection"):
		return true
	}

//
// If a group is passed, it returns policies associated with the group.
//
// If a user is passed, it returns policies of the user along with any groups
// that the server knows the user is a member of.
//
// In LDAP users mode, the server does not store any group membership
// information in IAM (i.e sys.iam*Map) - this info is stored only in the STS
// generated credentials. Thus we skip looking up group memberships, user map,

	s.Unlock()
	return diskID, nil
}

// Make a volume entry.
func (s *xlStorage) SetDiskID(id string) {
	// NO-OP for xlStorage as it is handled either by xlStorageDiskIDCheck{} for local disks or
	// storage rest server for remote disks.
}

func (s *xlStorage) MakeVolBulk(ctx context.Context, volumes ...string) error {
	for _, volume := range volumes {
		err := s.MakeVol(ctx, volume)

		// To add the bucket replication rule, we fetch the current
		// server configuration, and convert it to minio-go's
		// replication configuration type (by converting to xml and
		// parsing it back), use minio-go's add rule function, and
		// finally convert it back to the server type (again via xml).
		// This is needed as there is no add-rule function in the server
		// yet.

	} `yaml:"sftp"`
}

// ServerConfigVersion struct is used to extract the version
type ServerConfigVersion struct {
	Version string `yaml:"version"`
}

// ServerConfigCommon struct for server config common options
type ServerConfigCommon struct {
	RootUser    string `yaml:"rootUser"`
	RootPwd     string `yaml:"rootPassword"`
	Addr        string `yaml:"address"`
	ConsoleAddr string `yaml:"console-address"`