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 <[EMAIL PROTECTED]>:
>
> 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
>
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