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Bug
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Resolution: Unresolved
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Major
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None
SSH plugin throws auth cancel with simplest configuration.
On my jenkins server I can ssh to target machine using keys without passphrase.
When I add SSH location using SSH Plugin this consistently fails with message below.
Started by user Onno van der Straaten
Building in workspace ..
repository
executing script:
ls
[SSH] Exception:Auth cancel
com.jcraft.jsch.JSchException: Auth cancel
at com.jcraft.jsch.Session.connect(Session.java:451)
at com.jcraft.jsch.Session.connect(Session.java:150)
at org.jvnet.hudson.plugins.SSHSite.createSession(SSHSite.java:118)
at org.jvnet.hudson.plugins.SSHSite.executeCommand(SSHSite.java:128)
at org.jvnet.hudson.plugins.SSHBuilder.perform(SSHBuilder.java:60)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:814)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:160)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:593)
at hudson.model.Run.execute(Run.java:1568)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:237)
Build step 'Execute shell script on remote host using ssh' marked build as failure
Finished: FAILURE
On target machine /var/log/messages shows each time
Apr 3 08:26:13 mymachine sshd[12009]: Received disconnect from (ip): 3: com.jcraft.jsch.JSchException: Auth cancel
[JENKINS-17440] SSH Plugin throws auth cancel
Dev Kanaginhal
added a comment - I am experiencing same issue. How come no updates on this Major issue.
Dev Kanaginhal
added a comment - I am experiencing same issue. How come no updates on this Major issue. I was also seeing a similar issue. Watching /var/log/secure on the target system indicated that it was a bad password. I figured out that when I changed the password I updated an entry in "credentials" but didn't update the proper entry in the general configuration. It's a bit confusing having ssh sites NOT under credentials. Also it would be good if there was a better error message from this plugin (like "password failed" or something like that).
Jared Hodge
added a comment - - edited I was also seeing a similar issue. Watching /var/log/secure on the target system indicated that it was a bad password. I figured out that when I changed the password I updated an entry in "credentials" but didn't update the proper entry in the general configuration. It's a bit confusing having ssh sites NOT under credentials. Also it would be good if there was a better error message from this plugin (like "password failed" or something like that). 
Paul P
added a comment - Hi Team,
Could you please update us on this issue.seems like its an known/common issue.
Paul P
added a comment - Hi Team,
Could you please update us on this issue.seems like its an known/common issue. What happens when you run sshd on the server, with debug logging, in the foreground? It should tell you what's going on in more detail.
seems like its an known/common issue.
One of the most used plugins for Jenkins has five people experiencing this problem (going by watchers) in two years indicates it's not a common issue.
Laurentius Purba
added a comment - I am having the same issue.
My network topology is as follows.
I am using IP 10.0.21.xxx for our development and staging server (not accessible from outside), and 192.168.1.xxx for production servers ("public" facing site).
I am able to connect to all my 10.0.21.xxx IP, but not any single 192.168.1xxx IP.
Is this any progress on this?
Laurentius Purba
added a comment - I am having the same issue.
My network topology is as follows.
I am using IP 10.0.21.xxx for our development and staging server (not accessible from outside), and 192.168.1.xxx for production servers ("public" facing site).
I am able to connect to all my 10.0.21.xxx IP, but not any single 192.168.1xxx IP.
Is this any progress on this? 
Anthony Chan
added a comment - I am having the same issue, too.
Is anyone looking into it?
I hope the following information is helpful for the Jenkins team to analyze the issue
Jenkins version: 1.617
SSH plugin version: 2.4
Jenkins server:
Jenkins is installed on Red Hat Enterprise Linux Server release 6.6
ssh version is (from output of ssh -V)
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
Remote system (let's say machine A)
OS: Red Hat Enterprise Linux Server release 6.5
ssh version:
OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010
Remote system (let's say machine B)
OS: SUSE Linux Enterprise Server 11
ssh version:
OpenSSH_6.2p2, OpenSSL 0.9.8j-fips 07 Jan 2009
Observation:
The SSH plugin works with machine A, but it return the same error with machine B.
Does the ssh version matter?
thanks
--anthony
Anthony Chan
added a comment - I am having the same issue, too.
Is anyone looking into it?
I hope the following information is helpful for the Jenkins team to analyze the issue
Jenkins version: 1.617
SSH plugin version: 2.4
Jenkins server:
Jenkins is installed on Red Hat Enterprise Linux Server release 6.6
ssh version is (from output of ssh -V)
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
Remote system (let's say machine A)
OS: Red Hat Enterprise Linux Server release 6.5
ssh version:
OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010
Remote system (let's say machine B)
OS: SUSE Linux Enterprise Server 11
ssh version:
OpenSSH_6.2p2, OpenSSL 0.9.8j-fips 07 Jan 2009
Observation:
The SSH plugin works with machine A, but it return the same error with machine B.
Does the ssh version matter?
thanks
--anthony 
Philipp Moeller
added a comment - Can confirm this on Jenkins 2.7.2 SSH Plugin 2.4 with the default Jenkins Dockerimage.
Philipp Moeller
added a comment - Can confirm this on Jenkins 2.7.2 SSH Plugin 2.4 with the default Jenkins Dockerimage. 
I am seeing the same issue. Is it a configuration issue?