topic Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io. in Talend Studio

tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 03 Dec 2015 12:42:06 GMT

Hi everbody,
i'm facing a problem with the componenet tFTPconnection, whitch i use to connect to a secure ftp with login/password untill yesterday it was ok, today it gives me the error showen in the pcture i tried to change the jsch.jar to the newest version but no success.
Could you please help.
Regards,
Amine

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 03 Dec 2015 14:47:45 GMT

What do you have changed yesterday?
The problem looks like the protocol on the server side has been changed (not a SFTP anymore) or there is a network problem.

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 03 Dec 2015 15:03:44 GMT

I didn't change any thing, the only access that i have in that server is via sftp filezilla work but talend no.

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 03 Dec 2015 15:06:17 GMT

You told us, since yesterday it does not work... Something must have been changed obviously. Your task is now to ask the server administrators what has been changed.

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 03 Dec 2015 15:19:23 GMT

I sent an email to the administrators, i'm waiting for their response i will whrite you back when they answer me.
Thanks for your help

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 10 Dec 2015 10:48:07 GMT

Hello,
Server administrators said that nothing has changed, but i think that the algorithm used in there server has changed (i'm not sure).
i did severel tests this week trying to baypass the problem by java, i wrote a routine as below:
JSch jsch = new JSch();
        session = jsch.getSession(SFTPUSER,SFTPHOST,SFTPPORT);
        session.setPassword(SFTPPASS);

        java.util.Properties config = new java.util.Properties();
        config.put("kex", "diffie-hellman-group1-sha1,diffie-hellman-group14-sha1");
        config.put("StrictHostKeyChecking", "no");
           session.setConfig(config);
           session.connect(300000);
           channel = session.openChannel("sftp");
           channel.connect();
With this code it gives me the error ===> com.jcraft.jsch.JSchException: Algorithm negotiation fail
when i added the algos diffie-hellman-group-exchange-sha1,diffie-hellman-group-exchange-sha256 it gives me the first error : com.jcraft.jsch.JSchException: Session.connect: java.io.IOException: End of IO Stream Read
    JSch jsch = new JSch();
        session = jsch.getSession(SFTPUSER,SFTPHOST,SFTPPORT);
        session.setPassword(SFTPPASS);

        java.util.Properties config = new java.util.Properties();

        config.put("kex", "diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group-exchange-sha256");
        config.put("StrictHostKeyChecking", "no");
           session.setConfig(config);
           session.connect(300000);
           channel = session.openChannel("sftp");
           channel.connect();
Regards,
Amine

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 10 Dec 2015 13:32:12 GMT

Looks good. Did you succeed with this code?

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 10 Dec 2015 14:57:23 GMT

No, it gives the same error as the componenet tFTPconnection com.jcraft.jsch.JSchException: Session.connect: java.io.IOException: End of IO Stream Read, the problem is that i can connect to the server via filezilla.
I keep investigating ...

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 10 Dec 2015 15:30:56 GMT

Could you show us the connection properties you have used in FileZilla? I am pretty confident it will be covered by this API.

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Fri, 11 Dec 2015 08:33:26 GMT

Below how it looks the connection via filezilla, i'didn't use i specific configuration

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Tue, 22 Dec 2015 14:57:42 GMT

Hello,
I add this log from winscp connecting to the same server if it could help:
2015-12-21 15:27:03.515 WinSCP Version 5.7.6 (Build 5874) (OS 6.1.7601 Service Pack 1 - Windows Server 2008 R2 Standard)
. 2015-12-21 15:27:03.516 Configuration: C:\Users\CHHIH\Downloads\winscp576\WinSCP.ini
. 2015-12-21 15:27:03.516 Log level: Normal
. 2015-12-21 15:27:03.516 Local account: FRANCE\CHHIH
. 2015-12-21 15:27:03.516 Working directory: C:\Users\CHHIH\Desktop\TOS_DI-20141024_1545-V5.6.0\TOS_DI-20141024_1545-V5.6.0
. 2015-12-21 15:27:03.516 Process ID: 584
. 2015-12-21 15:27:03.516 Time zone: Current: GMT+1, Standard: GMT+1 (Romance Standard Time), DST: GMT+2 (Romance Daylight Time), DST Start: 29/03/2015, DST End: 25/10/2015
. 2015-12-21 15:27:03.516 Login time: lundi 21 décembre 2015 15:27:03
. 2015-12-21 15:27:03.516 --------------------------------------------------------------------------
. 2015-12-21 15:27:03.517 Script: Retrospectively logging previous script records:
> 2015-12-21 15:27:03.517 Script: open sftp://obk-atlasformen:***@3banken.mbsip.com/
. 2015-12-21 15:27:03.517 --------------------------------------------------------------------------
. 2015-12-21 15:27:03.517 Session name: obk-atlasformen@3banken.mbsip.com (Ad-Hoc site)
. 2015-12-21 15:27:03.517 Host name: 3banken.mbsip.com (Port: 22)
. 2015-12-21 15:27:03.517 User name: obk-atlasformen (Password: Yes, Key file: No)
. 2015-12-21 15:27:03.517 Tunnel: No
. 2015-12-21 15:27:03.517 Transfer Protocol: SFTP
. 2015-12-21 15:27:03.517 Ping type: -, Ping interval: 30 sec; Timeout: 15 sec
. 2015-12-21 15:27:03.517 Disable Nagle: No
. 2015-12-21 15:27:03.517 Proxy: none
. 2015-12-21 15:27:03.517 Send buffer: 262144
. 2015-12-21 15:27:03.517 SSH protocol version: 2; Compression: No
. 2015-12-21 15:27:03.517 Bypass authentication: No
. 2015-12-21 15:27:03.517 Try agent: Yes; Agent forwarding: No; TIS/CryptoCard: No; KI: Yes; GSSAPI: No
. 2015-12-21 15:27:03.517 Ciphers: aes,blowfish,3des,WARN,arcfour,des; Ssh2DES: No
. 2015-12-21 15:27:03.517 KEX: dh-gex-sha1,dh-group14-sha1,dh-group1-sha1,rsa,WARN
. 2015-12-21 15:27:03.517 SSH Bugs: A,A,A,A,A,A,A,A,A,A,A,A
. 2015-12-21 15:27:03.517 Simple channel: Yes
. 2015-12-21 15:27:03.517 Return code variable: Autodetect; Lookup user groups: A
. 2015-12-21 15:27:03.517 Shell: default
. 2015-12-21 15:27:03.517 EOL: 0, UTF: 2
. 2015-12-21 15:27:03.517 Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes
. 2015-12-21 15:27:03.517 LS: ls -la, Ign LS warn: Yes, Scp1 Comp: No
. 2015-12-21 15:27:03.517 SFTP Bugs: A,A
. 2015-12-21 15:27:03.517 SFTP Server: default
. 2015-12-21 15:27:03.517 Local directory: default, Remote directory: home, Update: Yes, Cache: Yes
. 2015-12-21 15:27:03.517 Cache directory changes: Yes, Permanent: Yes
. 2015-12-21 15:27:03.517 DST mode: 1
. 2015-12-21 15:27:03.517 --------------------------------------------------------------------------
. 2015-12-21 15:27:03.517 Looking up host "3banken.mbsip.com"
. 2015-12-21 15:27:03.596 Connecting to 193.138.123.210 port 22
. 2015-12-21 15:27:03.712 Server version: SSH-2.0-OpenSSH_6.6.1
. 2015-12-21 15:27:03.713 Using SSH protocol version 2
. 2015-12-21 15:27:03.713 We claim version: SSH-2.0-WinSCP_release_5.7.6
. 2015-12-21 15:27:03.767 Doing Diffie-Hellman group exchange
. 2015-12-21 15:27:03.915 Doing Diffie-Hellman key exchange with hash SHA-256
. 2015-12-21 15:27:05.007 Verifying host key rsa2 0x23,0xc516539810e82e5f bf526738d5d96bb2 1694d97381c3558a f01b1edec0c2bd8c 78ca55ecdff618e2 7b1a97f7d51e7978 1d4f32cbca24ba3e 1b7e6a9f0415dd6b e5e8a8d60277dd04 84d8ee9adb604142 9f727a95e88cb3f8 b461f98e0f553493 4d6b469d9ce94662 3ad29b4a0a36ec50 ca09cb05ef88d0ad db82d39f685b98fd with fingerprint ssh-rsa 1024 ee:fb:c3:b2:65:0f:58:8a:d5:6f:97:e3:c7:60:d9:45
. 2015-12-21 15:27:05.008 Host key matches cached key
. 2015-12-21 15:27:05.008 Host key fingerprint is:
. 2015-12-21 15:27:05.008 ssh-rsa 1024 ee:fb:c3:b2:65:0f:58:8a:d5:6f:97:e3:c7:60:d9:45
. 2015-12-21 15:27:05.008 Initialised AES-256 SDCTR client->server encryption
. 2015-12-21 15:27:05.008 Initialised HMAC-SHA-256 client->server MAC algorithm
. 2015-12-21 15:27:05.008 Initialised AES-256 SDCTR server->client encryption
. 2015-12-21 15:27:05.008 Initialised HMAC-SHA-256 server->client MAC algorithm
! 2015-12-21 15:27:05.151 Using username "obk-atlasformen".
. 2015-12-21 15:27:05.207 Attempting keyboard-interactive authentication
. 2015-12-21 15:27:05.274 Prompt (keyboard interactive, "SSH server authentication", "Using keyboard-interactive authentication.", "Password: ")
. 2015-12-21 15:27:05.274 Using stored password.
. 2015-12-21 15:27:05.412 Prompt (keyboard interactive, "SSH server authentication", <no instructions>, <no prompt>)
. 2015-12-21 15:27:05.412 Ignoring empty SSH server authentication request
. 2015-12-21 15:27:05.468 Access granted
. 2015-12-21 15:27:05.468 Opening session as main channel
. 2015-12-21 15:27:05.521 Opened main channel
. 2015-12-21 15:27:05.665 Started a shell/command
. 2015-12-21 15:27:05.665 --------------------------------------------------------------------------
. 2015-12-21 15:27:05.665 Using SFTP protocol.
. 2015-12-21 15:27:05.666 Doing startup conversation with host.
> 2015-12-21 15:27:05.666 Type: SSH_FXP_INIT, Size: 5, Number: -1
< 2015-12-21 15:27:05.722 Type: SSH_FXP_VERSION, Size: 150, Number: -1
. 2015-12-21 15:27:05.722 SFTP version 3 negotiated.
. 2015-12-21 15:27:05.722 Unknown server extension posix-rename@openssh.com="1"
. 2015-12-21 15:27:05.722 Supports statvfs@openssh.com extension version "2"
. 2015-12-21 15:27:05.722 Unknown server extension fstatvfs@openssh.com="2"
. 2015-12-21 15:27:05.722 Supports hardlink@openssh.com extension version "1"
. 2015-12-21 15:27:05.722 Unknown server extension fsync@openssh.com="1"
. 2015-12-21 15:27:05.722 We believe the server has signed timestamps bug
. 2015-12-21 15:27:05.722 We will use UTF-8 strings until server sends an invalid UTF-8 string as with SFTP version 3 and older UTF-8 string are not mandatory
. 2015-12-21 15:27:05.722 Limiting packet size to OpenSSH sftp-server limit of 262148 bytes
. 2015-12-21 15:27:05.722 Getting current directory name.
. 2015-12-21 15:27:05.722 Getting real path for '.'
> 2015-12-21 15:27:05.722 Type: SSH_FXP_REALPATH, Size: 10, Number: 16
< 2015-12-21 15:27:05.782 Type: SSH_FXP_NAME, Size: 23, Number: 16
. 2015-12-21 15:27:05.782 Real path is '/'
. 2015-12-21 15:27:05.782 Startup conversation with host finished.
< 2015-12-21 15:27:05.782 Script: Active session: obk-atlasformen@3banken.mbsip.com
Regards,
Amine

Re: tFTPconnection om.jcraft.jsch.JSchException: Session.connect: java.io.

Anonymous — Thu, 22 Nov 2018 10:37:24 GMT

are there any new Information? did you solve the Problem? can somebody tell us here a solution?

thanks in advanced