# Cannot SSH into Jenkins-cli
**URL:** https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222
**Category:** Ask a question
**Created:** [January 5, 2023, 1:02pm UTC](https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222 "2023-01-05T13:02:10Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@emimri](https://community.jenkins.io/u/emimri)
#### Post date: [January 5, 2023, 1:02pm UTC](https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222/1 "2023-01-05T13:02:10Z")
When I ssh (I am using Windows 10 with OpenSSH) into jenkins-cli.jar I get the following error:
```auto
Jan 05, 2023 12:48:06 PM io.jenkins.cli.shaded.org.apache.sshd.common.util.security.AbstractSecurityProviderRegistrar getOrCreateProvider
INFO: getOrCreateProvider(EdDSA) created instance of io.jenkins.cli.shaded.net.i2p.crypto.eddsa.EdDSASecurityProvider
Jan 05, 2023 12:48:07 PM io.jenkins.cli.shaded.org.apache.sshd.common.io.DefaultIoServiceFactoryFactory getIoServiceProvider
INFO: No detected/configured IoServiceFactoryFactory; using Nio2ServiceFactoryFactory
io.jenkins.cli.shaded.org.apache.sshd.common.RuntimeSshException: Failed to get the session.
at io.jenkins.cli.shaded.org.apache.sshd.client.future.DefaultConnectFuture.getSession(DefaultConnectFuture.java:59)
at io.jenkins.cli.shaded.org.apache.sshd.client.future.DefaultConnectFuture.getSession(DefaultConnectFuture.java:34)
at hudson.cli.SSHCLI.sshConnection(SSHCLI.java:102)
at hudson.cli.CLI._main(CLI.java:294)
at hudson.cli.CLI.main(CLI.java:103)
Caused by: java.io.IOException: The semaphore timeout period has expired
at java.base/sun.nio.ch.Iocp.translateErrorToIOException(Iocp.java:299)
at java.base/sun.nio.ch.Iocp$EventHandlerTask.run(Iocp.java:389)
at java.base/java.lang.Thread.run(Thread.java:1589)
```
After trying:
```auto
java -jar jenkins-cli.jar -s SERVER:8080/ -ssh -user MY_USERNAME
```
What is the cause of this error, so that I can fix it and SSH into my jenkins instance?
---
### Author:  [@poddingue](https://community.jenkins.io/u/poddingue)
#### Post date: [January 5, 2023, 1:34pm UTC](https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222/2 "2023-01-05T13:34:51Z")
Hello @emimri and welcome to this community 👋
What version of Jenkins are you running?
Your controller is running on Windows, am I right?
What is your Java version?
What is the operating system your Jenkins agent is running?
What is its operating system?
What are you trying to achieve? Link a Jenkins agent from the controller to the agent through `ssh` ?
Please have a look at [Using Jenkins agents](https://www.jenkins.io/doc/book/using/using-agents/) .
---
### Author:  [@emimri](https://community.jenkins.io/u/emimri)
#### Post date: [January 5, 2023, 1:45pm UTC](https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222/3 "2023-01-05T13:45:01Z")
Hello Bruno,
Not sure whether I can answer all your questions accurately.
I have been granted permission to have access to Jenkins, I believe the controller is someone else in my business. I am using windows 10, but have all access/permissions in Jenkins.
We’re running Jenkins on a server, but I am attempting to ssh into Jenkins following this documentation: [Jenkins CLI](https://www.jenkins.io/doc/book/managing/cli/)
I am using Java:
```auto
java version "19.0.1" 2022-10-18
Java(TM) SE Runtime Environment (build 19.0.1+10-21)
Java HotSpot(TM) 64-Bit Server VM (build 19.0.1+10-21, mixed mode, sharing)
```
The operating system is Linux:
```auto
os.version: 3.10.0-1160.53.1.el7.x86_64
```
The Jenkins is using Java 11 version 55.
I was going to attempt to SSH into Jenkins and `sudo apt-get install` a package with admin permissions, because I cannot do this in the shell. Unless, there is an alternative approach?
---
### Author:  [@poddingue](https://community.jenkins.io/u/poddingue)
#### Post date: [January 5, 2023, 2:12pm UTC](https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222/4 "2023-01-05T14:12:31Z")
Is there an HTTP reverse proxy between your machine and the Jenkins controller?
Is there a firewall?
Are the `ssh` ports authorized?
---
### Author:  [@emimri](https://community.jenkins.io/u/emimri)
#### Post date: [January 5, 2023, 3:55pm UTC](https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222/5 "2023-01-05T15:55:34Z")
Well our jenkins server runs on a VPN, and it’s only available as an application on the browser when the VPN is on.
I have attempted the link you have provided with using Jenkins agents. Although, I attempted this on my mac os, which does not have vpn access to our jenkins server. However, my windows PC does, would I still get SSH access to jenkins with this approach?
After some extra research:
1. My windows environment lacks administration privileges, therefore, this could be blocking the SSH access.
---
### Author:  [@PierreBtz](https://community.jenkins.io/u/PierreBtz)
#### Post date: [January 6, 2023, 10:03am UTC](https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222/6 "2023-01-06T10:03:22Z")
I have no idea on what’s blocking the ssh connection, but so that you do not loose to much time to pursue something that won’t work in the end:
> I was going to attempt to SSH into Jenkins and `sudo apt-get install` a package with admin permissions, because I cannot do this in the shell.
This is not what the ssh mode of the Jenkins-cli will bring you. It just use ssh to communicate with Jenkins to run jenkins-cli commands (like trigger a job, get the result of a job etc…) but it won’t open a shell to the machine running Jenkins.
---
### Author:  [@emimri](https://community.jenkins.io/u/emimri)
#### Post date: [January 6, 2023, 2:37pm UTC](https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222/7 "2023-01-06T14:37:27Z")
Ah I see! It’s possible I am blocked by a company firewall that prevents the SSH connection from going through successfully.
Additionally, by what other means can I successfully sudo install files, or can this only be granted by the controller who has access to the Jenkins files to modify ROOT access for users?
---
### Author:  [@PierreBtz](https://community.jenkins.io/u/PierreBtz)
#### Post date: [January 6, 2023, 2:50pm UTC](https://community.jenkins.io/t/cannot-ssh-into-jenkins-cli/5222/8 "2023-01-06T14:50:12Z")
> by what other means can I successfully sudo install files
You need to ask your ops team an access to the machine with proper permissions.