Re: [JSch-users] Connect to sub machine via SSH and Jsch

[Hajo P. <haj...@fo...>]

Am Fri, 18 Dec 2015 16:46:45 +0100
schrieb Mohamed Boussaa <moh...@gm...>:

> I did that but I got "connection refused"
> 
> 
> 
>      StringBuilder outputBuffer = new StringBuilder();
> 
> 
>         String host="10.0.0.1"; // First level target
> 
>         String user="user1";
> 
>         String password="pass1";
> 
>         String tunnelRemoteHost="10.0.0.22"; // The host of the
> second target
> 
>         String secondPassword="pass2";
> 
>         int port=22;
> 
> 
> 
>         JSch jsch=new JSch();
> 
>         Session session=jsch.getSession(user, host, port);
> 
>         session.setPassword(password);
> 
>         localUserInfo lui=new localUserInfo();
> 
>         session.setUserInfo(lui);
> 
>         session.setConfig("StrictHostKeyChecking", "no");
> 
>         // create port from 2233 on local system to port 22 on
> tunnelRemoteHost
> 
>         session.setPortForwardingL(2251, tunnelRemoteHost, 22);
> 
>         session.connect();
> 
>         session.openChannel("direct-tcpip");
> 
> 
>         // create a session connected to port 2233 on the local host.
> 
>         Session secondSession = jsch.getSession("user2",
> tunnelRemoteHost, 2251);

I didn't test or compile anything, but I think this line is wrong.

You opened up your tunnel port on the FIRST host. So you have to
connect to your first host (ip 10.0.0.1 - called "host" in your code)
to reach the second one by tunnel.

regards
Hajo

> 
>         secondSession.setPassword(secondPassword);
> 
>         secondSession.setUserInfo(lui);
> 
>         secondSession.setConfig("StrictHostKeyChecking", "no");
> 
> 
>         secondSession.connect(); // now we're connected to the
> secondary system
> 
>         Channel channel=secondSession.openChannel("exec");
> 
>         ((ChannelExec)channel).setCommand("hostname");
> 
> 
>         channel.setInputStream(null);
> 
> 
>         InputStream stdout=channel.getInputStream();
> 
> 
>         channel.connect();
> 
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