CODEWITHSUNDEEP
javasslftpapache-commons-net
jyoshiriro
jyoshiriro

Reputation: 51

"Remote host closed connection during handshake" when connecting to FTP server using Commons Net FTPSClient

My code (I use -Dhttps.protocols=TLSv1.2 VM argument when run):

FTPSClient ftpClient = new FTPSClient("TLS", false);
ftpClient.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));
ftpClient.setAuthValue("TLS");

ftpClient.connect("myhost", 990);
ftpClient.login("mylogin", "mypassword");

Stack trace:

javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:992)
// too many traces...
Caused by: java.io.EOFException: SSL peer shut down incorrectly
at sun.security.ssl.InputRecord.read(InputRecord.java:505)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)
... 33 more

Log from WinSCP (I can send files using WinSCP):

536 Copying 1 files/directories to remote directory "/" 536 PrTime: Yes; PrRO: No; Rght: rw-r--r--; PrR: No (No); FnCs: N; RIC: 0100; Resume: S (102400); CalcS: Yes; Mask: . 536 TM: B; ClAr: No; RemEOF: No; RemBOM: No; CPS: 0; NewerOnly: No; InclM: ; ResumeL: 0 536 AscM: *.*html; *.htm; *.txt; *.php; *.php3; *.cgi; *.c; *.cpp; *.h; *.pas; *.bas; *.tex; *.pl; *.js; .htaccess; *.xtml; *.css; *.cfg; *.ini; *.sh; *.xml 539 File: 'C:\Users\trescon.jramos\Documents\cliente-dados.sql' [2016-10-06T16:34:29.298Z] [4869] 557 Copying "C:\Users\trescon.jramos\Documents\cliente-dados.sql" to remote directory started. 560 Binary transfer mode selected. 560 Iniciando carregamento de C:\Users\trescon.jramos\Documents\cliente-dados.sql 560 TYPE I 562 200 Type set to I 563 PASV 568 227 Entering Passive Mode (10,28,14,218,250,0) 569 STOR cliente-dados.sql 569 Conectando a 10.28.14.218:64000... 575 150 Opening data channel for file upload to server of "/cliente-dados.sql" 579 Session ID reused 579 Using TLSv1.2, cipher TLSv1/SSLv3: ECDHE-RSA-AES256-GCM-SHA384, 2048 bit RSA, ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD 580 Conexão SSL estabelecida 586 226 Successfully transferred "/cliente-dados.sql" 586 MFMT 20161006163429 cliente-dados.sql 590 213 modify=20161006163429; /cliente-dados.sql 590 Carregamento bem-sucedido 591 Transfer done: 'C:\Users\trescon.jramos\Documents\cliente-dados.sql' [4869]

Upvotes: 3

Views: 2760

Answers (1)

Martin Prikryl
Martin Prikryl

Reputation: 202088

You are connecting to port 990, what is an implicit FTPS port. Yet, you are passing false to isImplicit argument of FTPSClient constructor.

Either pass true, if you really want to use the implicit FTPS:

FTPSClient ftpClient = new FTPSClient("TLS", true);

Or actually, you should really use an explicit FTPS and the default FTP port 21 (as the implicit FTPS is non-standard legacy compatibility hack):

FTPSClient ftpClient = new FTPSClient();
// ...
ftpClient.connect("myhost");

In other words, all you need to use FTPS is use FTPSClient, no additional arguments or calls are needed.

Upvotes: 0

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