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Ant SshExec task throwing JschException : Auth fail

 
Sonny Gill
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Posts: 1211
IntelliJ IDE Mac
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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
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Posts: 1211
IntelliJ IDE Mac
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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
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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
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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.
 
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