503 Bad sequence of commands

[Anonymous]

I am attempting to connect to FTP and I am receiving the following error message:

Exception in component tFTPConnection_1 (FTP)
javax.net.ssl.SSLException: 503 Bad sequence of commands.

 at org.apache.commons.net.ftp.FTPSClient.execPROT(FTPSClient.java:528)
 at configuration.ftp_0_1.FTP.tFTPConnection_1Process(FTP.java:533)
 at configuration.ftp_0_1.FTP.runJobInTOS(FTP.java:2011)
 at configuration.ftp_0_1.FTP.main(FTP.java:1862)

The FTP uses SSL, passive connection mode and explicit security mode. The port (21), host, username and password are all correct; using the same settings I can log in through FileZilla. I can also log into SFTP without any issues using the same sequence (I change the FTPConnection component). What am I doing wrong?

[Anonymous]

Hello,

It indicates the server is unavailable.

Have you tried to set the FTPS option (it is FTP over SSH) on tFTPConnection component?

Best regards

Sabrina

[Anonymous]

I tired that. The box is checked (FTPS Support (support tFTPGet temporarily). I took at screenshot of my configuration. As you can see from the screenshot I have to use a keystore. I created one and imported a key given to me by the host of the FTP. That is all that has happened in that regard.
Capture.PNG

[Anonymous]

Hello,

Did you still get the 503 bad sequence of commands error?

For creating keystore and truststore, you can check documentation:

https://docs.oracle.com/cd/E19509-01/820-3503/ggfen/

Best regards

Sabrina

[fred271828]

I'm getting this same error now when FTPSClient.execPROT("P") is being called.  The error has nothing to do with the keystore as the FTPSClient.connect and FTPSClient.login are both succeeding.