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

[Anonymous]

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

[Anonymous]

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.

[Anonymous]

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

[Anonymous]

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.

[Anonymous]

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

[Anonymous]

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

[Anonymous]

Looks good. Did you succeed with this code?

[Anonymous]

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 ...

[Anonymous]

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

[Anonymous]

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