Re: [JSch-users] Multiple connections

[Andre C. <and...@nr...>]

Hi Antoine,
Hmmm, I never got that error before.
What version of the SSH server are you running on B and C?

Regards,
	Andre

Antoine B wrote:
> Thanks for your help Andre!
> 
> Here is my code :
> 
>         JSch jsch = new JSch();
>         Session session = jsch.getSession("mylogin","B",22);
>         UserInfo ui = new MyUserInfo();
>         session.setUserInfo(ui);
>         session.connect();
> 
>         // Setup port forwarding
>         int assinged_port = session.setPortForwardingL(0,"C",22);
> 
>         // Connecting to remote system through port forwarding...
>         Session session2 = jsch.getSession("mylogin","127.0.0.1
> ",assinged_port);
>         session2.setUserInfo(ui);
>         session2.connect();
> 
>         // We are now connected to system C (through B).
>         // Lets run a command on system C
>         Channel channel = session2.openChannel("exec");
>         ((ChannelExec) channel).setCommand("ls -l");
>         channel.connect();
> 
>         channel.setInputStream(System.in);
>         channel.setOutputStream(System.out);
> 
> and here is the error raised on session2.connect() :
> 
> com.jcraft.jsch.JSchException: invalid server's version
> stringcom.jcraft.jsch.JSchException: invalid server's version string
> 
>     at com.jcraft.jsch.Session.connect(Session.java:256)
>     at com.jcraft.jsch.Session.connect(Session.java:149)
>     at UserAuthKI.main(UserAuthKI.java:30)
> 
> Perhaps it's because C is only reachable through B?
> 
> 
> 2008/4/14, Andre Charbonneau <and...@nr...>:
>> Hello,
>> Supposing we have 3 systems, A, B and C, here is how I do it in my
>> application:
>>
>>      JSch jsch = new JSch();
>>        session = jsch.getSession(
>>          "<username on system B>",
>>          "<hostname of system B>",
>>          "<ssh port on system B>");
>>        UserInfo ui = MyUserInfo();
>>        session.setUserInfo(ui);
>>        session.connect();
>>
>>        // Setup port forwarding
>>        int assinged_port = session.setPortForwardingL(
>>          0,
>>          <hostname of system C>,
>>          <ssh port on system C>);
>>
>>        // Connecting to remote system through port forwarding...
>>        Session session2 = jsch.getSession(
>>          <username on system C>,
>>          "127.0.0.1",
>>          assinged_port);
>>        session2.setUserInfo(ui);
>>        session2.connect();
>>
>>        // We are now connected to system C (through B).
>>        // Lets run a command on system C
>>        Channel channel = session2.openChannel("exec");
>>        ((ChannelExec) channel).setCommand(<command to run on C>);
>>        channel.connect();
>>
>>
>>
>> Hope this helps,
>>
>>        Andre
>>
>>
>> Antoine B wrote:
>>
>>> Hello,
>>> What I want to do is simple :
>>> I want to connect on a server 'serv1', then with that connection opened
>>> I
>>> want to connect on a server 'serv2'. After that, I want to execute a
>>> script
>>> located on serv2.
>>> I want to do it automatically, without user's interaction (the users
>>> don't
>>> need to write in a shell for example).
>>> 'serv2' is only accessible from 'serv1' (no direct connnection is
>>> allowed).
>>> Is it possible with jsch?
>>> For the moment, I can open a connection on serv1, but the user had to
>>> type
>>> "ssh serv2" on the opened shell.
>>> Thanks and sorry for my english.
>>>
>>>
>>>
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>>
>> --
>> Andre Charbonneau
>> Research Computing Support, IMSB
>> National Research Council Canada
>> 100 Sussex Drive, Rm 2025
>> Ottawa, ON, Canada K1A 0R6
>> 613 993-3129
>>
> 


-- 
Andre Charbonneau
Research Computing Support, IMSB
National Research Council Canada
100 Sussex Drive, Rm 2025
Ottawa, ON, Canada K1A 0R6
613 993-3129