aspose file tools*
The moose likes Ant, Maven and Other Build Tools and the fly likes Ant SshExec task throwing JschException : Auth fail Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Java 8 in Action this week in the Java 8 forum!
JavaRanch » Java Forums » Engineering » Ant, Maven and Other Build Tools
Bookmark "Ant SshExec task throwing JschException : Auth fail" Watch "Ant SshExec task throwing JschException : Auth fail" New topic
Author

Ant SshExec task throwing JschException : Auth fail

Sonny Gill
Ranch Hand

Joined: Feb 02, 2002
Posts: 1211

Hi guys,

This script was working fine, but stopped working after the remote server was upgraded from Suse 9 to Suse9.1 .
The problem should not be the ssh hosts file, because I can use ssh directly to connect without a problem, and also if I remove that file, ant throws a different exception (something along the lines of Host lookup failed).
I am really stumped that why the authorization is failing when the password is included right there in the script (I know that is not very secure, this is to get it working)

Any help is greatly appreciated!


Following is the stripped down ant script -


And the exception thrown is -

Sonny Gill
Ranch Hand

Joined: Feb 02, 2002
Posts: 1211

So...I happened to find out why this was happening.
The reason the script started to fail must have been a configuration change on the remote system.

Ref - http://sancho-gui.sourceforge.net/faq.phtml


SSH2 NOTE: (might not be required if using 0.9.4-22 or newer and id_dsa)

In order for SSH2 tunneling to function correctly one must ensure that the
following line is uncommented in /etc/ssh/sshd_config :
--------------------------CUT-------------------------------
# Change to yes to enable tunnelled clear text passwords
PasswordAuthentication yes
--------------------------CUT-------------------------------

Otherwise the initiation of the tunnel will fail with
"SSH Initialization failed, try again?
com.jcraft.jsch.JSchException: Auth fail"


Thanks to whoever posted the above faq entry

After editing my remote sshd configuration, I can run the script again.

A discussion of what this setting means can be found here -
http://www.lugod.org/mailinglists/archives/vox-tech/2005-07/msg00012.html

Sonny
Ananya Joisa
Greenhorn

Joined: Jun 18, 2012
Posts: 1
Hi,

I had also got the error "com.jcraft.jsch.JSchException: Auth fail " while using the ANT task sshexec and I followed the solution given in this forum.

# Change to yes to enable tunnelled clear text passwords
PasswordAuthentication yes

But I still see the same error. Could anyone help?
Peter Johnson
author
Bartender

Joined: May 14, 2008
Posts: 5779
    
    7

There is more to ssh authentication than simply setting a property. If the remote system uses public/private keys, then how to set that up on your system is much different than if the remote system uses a username/password scheme. So before we can help you, we need to know what kind of authentication is used by the remote system for ssh.


JBoss In Action
 
jQuery in Action, 2nd edition
 
subject: Ant SshExec task throwing JschException : Auth fail
 
Similar Threads
ANT - JUNIT problems
Ant and scp
Wrapping an existing core Ant task
SCP task in Ant
ftpclient class not found?