Auto ssh on boot

Microsoft partnered with Canonical to create Bash on Ubuntu on Windows, running through a technology called the Windows Subsystem for Linux. Below are instructions on how to set up the ssh server to run automatically at boot. Finally, you will need to configure the ssh server to start without requiring password. Run the command sudo visudo and add this line to the end of the file:.

This is great, thanks. Have you figured out how to get it to run via Task Scheduler or the like so that it runs on boot, without requiring the user to login first? I have found that the instructions above no longer work if you've upgraded your Windows Subsystem Linux Ubuntu to I forked this Gist, and made a modification which now works on Please see my Gist if you have this issue.

Save the file and move it to a more accessible location, e. I'm trying to figure out how to run this on Windows Server Core, where there's no GUI and all the setup needs to be done via Powershell. The Register-ScheduledJob command won't run a vbs file on boot, only powershell WSL Autostart.

If you're having trouble getting this to work, I needed to create a rule in Windows Firewall to open port. Runnng sudo service ssh --full-restart with WSL Ubuntu I managed to get it working by following these instructions but without reinstalling the sshd software. Otherwise it complained about missing privilege separation folder.

Seems it got removed between restarts. It also works fine at port 22, I did not have to change port. Is there a reason not to work with password less sudo for the user starting sshd?

Haven't been on GitHub in a while. Thanks for the feedback everyone. I made a couple changes to the gist, taken into account that WSL has changed with Ubuntu As always feel free to suggest improvements. As of the latest WSL with Ubuntu I forget which issue that resolved back when I first made the guide.

Also it is no longer necessary to do privilege separation. Guide has been updated to remove this step. I am use weberjn 's advise, direct all service ssh start and change visudo to add permission to service. In case this helps someone: I couldn't figure out why mine wasn't working until I figured out I had 2 registered distributions of Linux running on my system.

As of Win10 perhaps earlier?By persistent I mean, that it is made sure the tunnel will always run. For example, once your ssh connection times out By server-side timeoutyour tunnel should be re-established automatically. I know there are plenty of scripts out there which try to do that somehow. So the game-changer here is AutoSSH. Autossh is a program to start a copy of ssh and monitor it, restarting it as necessary should it die or stop passing traffic.

Ignore -M for now.

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The important part to remember is that -f run in background is not passed to the ssh command, but handled by autossh itself. Apart from that you can then use it just like you would use ssh to create any forward or reverse tunnels.

Note 1: Before you use autosshmake sure the connection works as expected by trying it with ssh first. This is required for ssh as well as for autosshsimply because in a background run a passphrase cannot be entered interactively.

With -M AutoSSH will continuously send data back and forth through the pair of monitoring ports in order to keep track of an established connection.

If no data is going through anymore, it will restart the connection. The first one is used to send data and the one above to receive data on. Unfortunately, this is not too handy, as it must be made sure both ports the specified one and the one directly above a free not used.

So in order to overcome this problem, there is a better solution:. This will keep the connection alive when there is no other activity and also when it does not receive any alive data, it will tell AutoSSH that the connection is broken and AutoSSH will then restart the connection.

The AutoSSH man page also recommends the second solution:. Luckily autossh is also aware of this file, so we can still keep our configuration there. This was our very customized configuration for ssh tunnels which had custom ports and custom rsa keys:.

If you recall all the ssh options we had used already, we can now simply start the autossh tunnel like so:. AutoSSH can also be controlled via a couple of environmental variables. Those are useful if you want to run AutoSSH unattended via cronusing shell scripts or during boot time with the help of systemd services.

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Default is 30 seconds. If set to 0, then this behaviour is disabled, and as well, autossh will retry even on failure of first attempt to run ssh. All other environmental variables including the once responsible for logging options can be found in the AutoSSH Readme. If you want a permanent SSH tunnel already created during boot time, you will nowadays have to create a systemd service and enable it. If you thing I have missed some important parts or you know any other cool stuff, let me know and I will update this post.

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Raspberry Pi Stack Exchange is a question and answer site for users and developers of hardware and software for Raspberry Pi. It only takes a minute to sign up. I'm following a number of tutorials that explain how to setup an SD card that boots automatically enabling ssh in the process.

I'm doing this as I only have a laptop and no spare keyboard, screen, etc. All of the tutorials I've read describe using dd so doing this using Unix Ubuntu to write the.

Done like this:. I've run the dd action using the two most recent image files from the RPi official site - wheezy-raspbian. Still with no success. Although Raspbian used to enable ssh by default, from December it no longer does so.

It does not need to be done again with the same card image. You can also enable it through raspi-config as before. If you're working from a different computer, you should first mount the SD-card in your filesystem, then operate on.

I don't have access to a proper box now to verify exact commands, but it would look something like:. I had to format the SD-card and put the Raspbian image on there before booting up the RPi for the first time.

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Even though Rasbian uses systemd A hydra monster of a program that goes against the Unix philosophy of do one thing and do it well. You can use the "update-rc. Here's how to do a headless Raspbian install on your Pi. Download Raspbian Image. Head on over here to grab a copy of the Raspbian image. Write Image to SD Card. Write the image to SD card. Boot your Pi. Find your Pi's IP Address.

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SSH into your Pi. Configure your Pi.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

I have a site as a remote Git repo pulling from Bitbucket. And I'm good to go. Is there any way to automate this process so I don't have to do it every time I login? The server is running RedHat 6.

auto ssh on boot

Just in case the above link vanishes some day, I am capturing the main piece of the solution below:. This version is especially nice since it will see if you've already started ssh-agent and, if it can't find it, will start it up and store the settings so that they'll be usable the next time you start up a shell.

Setup shell to have an environment variable for the socket. This will instruct the ssh client to always add the key to a running agent, so there's no need to ssh-add it beforehand. Old question, but I did come across a similar situation. Don't think the above answer fully achieves what is needed. The missing piece is keychain ; install it if it isn't already. This will start the ssh-agent if it isn't running, connect to it if it is, load the ssh-agent environment variables into your shell, and load your ssh key.

If your keys do not require to type password, I suggest following solution. Add the following to your. Note that several ssh-agent processes is not a disadvantage, because they don't take more memory or CPU time. This should only prompt for a password the first time you login after each reboot. It will keep reusing the same ssh-agent as long as it stays running. So I used to use the approaches described above, but I kind of prefer the agent to die when my last bash session ends.

This is a bit longer than the other solutions, but its my preferred approach. The basic idea is that the first bash session starts the ssh-agent.

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As bash sessions shut down each deletes its own hardlink. The last session to close will find that the hardlinks have 2 links the hardlink and the originalremoval of the processes own socket and killing of the process will result in 0, leaving a clean environment after the last bash session closes.

Just to add yet another solution :P, I went with a combination of spheenik and collin-anderson 's solutions. This starts a new ssh-agent if not running for the current user, or re-sets the ssh-agent env parameter if running.

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Users of the fish shell can use this script to do the same thing. I use the ssh-ident tool for this.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up.

How to automatically load ssh keys when Windows 10 boots using putty pagent

I want to communicate between several computers on my network static Ethernetthrough SSH. In order to do that I need to run ssh-add every time I log in on a specific machine, how can I do it so that it's set up once and it doesn't ask me for the passphrase every time I log in or reboot my machine? This is a typical example of a trade-off between security and convenience. Luckily there are a number of options. The most appropriate solution depends on the usage scenario and desired level of security.

Now the passphrase has to be entered every time the key is used for authentication. While this is the best option from a security standpoint, it offers the worst usability. This may also lead to a weak passphrase being chosen in-order-to lessen the burden of entering it repeatedly. Now the passphrase must be entered upon every login. While slightly better from a usability perspective, this has the drawback that ssh-agent prompts for the passphrase regardless of if the key is to be used or not during the login session.

Each new login also spawns a distinct ssh-agent instance which remains running with the added keys in memory even after logout, unless explicitly killed. Creating multiple ssh-agent instances can be avoided by creating a persistent communication socket to the agent at a fixed location in the file system, such as in Collin Anderson's answer. This is an improvement over spawning multiple agents instances, however, unless explicitly killed the decrypted key still remains in memory after logout.

auto ssh on boot

On desktops, ssh-agents included with the desktop environment, such as the Gnome Keyring SSH Agentcan be a better approach as they typically can be made to prompt for the passphrase the first time the ssh-key is used during a login session and store the decrypted private key in memory until the end of the session.

It adds keys only once as they are needed, regardless of how many terminals, ssh or login sessions that require access to an ssh-agent.

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It can also add and use a different agent and different set of keys depending on the host being connected to, or the directory ssh is invoked from. This allows for isolating keys when using agent forwarding with different hosts. It also allows to use multiple accounts on sites like GitHub.

auto ssh on boot

On subsequent logins, keychain will connect to the existing ssh-agent instance. In practice, this means that the passphrase must be be entered only during the first login after a reboot. On subsequent logins, the unencrypted key from the existing ssh-agent instance is used.

From a security point of view, ssh-ident and keychain are worse than ssh-agent instances limited to the lifetime of a particular session, but they offer a high level of convenience. By doing this passphrases must be re-entered on login as above, but cron jobs will still have access to the unencrypted keys after the user logs out.

The keychain wiki page has more information and examples.

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From a security standpoint, this is the worst option since the private key is entirely unprotected in case it is exposed. This is, however, the only way to make sure that the passphrase need not be re-entered after a reboot.

While it might seem like a straightforward idea to pass the passphrase to ssh-add from a script, e. This can be worked around with expecta tool for automating interactive applications. Below is an example of a script which adds a ssh-key using a passphrase stored in the script:. Note that as the passphrase is stored in plaintext in the script, from a security perspective, this is hardly better than having a passwordless ssh-key.

If this approach is to be used, it is important to make sure that the expect script containing the passphrase has proper permissions set to it, making it readable, writable and runnable only by the key owner. This should only prompt for a password the first time you login after each reboot. It will keep reusing the same ssh-agent as long as it stays running.

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Not closely related to the OP's question, but it might be useful to others: since 7. In order to cache unlocked keys, it obviously needs to unlock those keys. For unlocking keys that are locked with a passphrase, it obviously needs to know these passphrases.

Any method that does not require authorization from a human being e. Having said all this, you can simply use ssh-keys that are not password protected hit Enter when asked for a password during key-generation.Article by Truelite.

There are many occasions where you need to create connections to machines and services that are protected by firewalls because it is appropriate to adequately protect them, but for which the creation of a VPN becomes an excessive burden. For this reason, the ability to port forwarding via SSH is very useful for creating an encrypted tunnel from one machine to another, allowing you to enable only local access such as a MySQL only listens locally safely, with the only the problem that in case of problems, the SSH connection and its tunnels could fall.

The program detects whether the instance of ssh that it has launched terminates for a signal or a connection error and in this case it re-run it, but if you end of ssh comes with a signal of SIGKILL autossh interprets it as a explicit termination, and stops itself.

Similarly,is interpreted a termination signal to autossh itself, which in this case stop itself and his instance of ssh. The command takes a primary option, -M that allows you to specify a monitoring port for the connection ie to verify that the instance of ssh is up and running using the port indicated and the next to send the message that should go back.

With version 2 of the ssh Protocol it supports an internal control of the connection, which is more reliable, therefore we suggest using the appropriate control options which we will see later and always indicate a null value ie -M 0which disables this kind of monitoring. Create that user on both ends of the tunnel with:.

The decision to not set the password for the authentication requires the use of keys, which is anyway the best choice and if possible to use exclusively. For this to the start of the tunnel connection you have to create the key for the user, that if you want the tunnel to start automatically at startup, will be without a passphrase, for this you must run the following commands:.

Once this is done you can create a tunnel just by running the opportune command on ssh through autossh. Since you only want to bring up the tunnel you need to use the option -N to tell ssh to not run any commands, the option -f to put it in the background, and these options are also important:.

So for example if you want to create a tunnel to connect to a remote MySQL database on a machine that is accessible via SSH, once created the users, as described, it will be sufficient to run the command:. While the new autossh connection will succeed, it wont open a tunnel and autossh wont restart since it thinks the connection is okay. Hi, Thank you so much for this great tutorial, I was trying to figure out a way to do it since yesterday. Best regards. Would have been nice to tell us what autossh is, and where to get it?

I ran into issues using this method. I had been struggling with frustrating timeouts on large multi-hundred-MB git pulls for weeks…. I put those in my autossh command, and presto — no timeouts, the git pull runs, and everything works.

Your Comment. Name required.As more and more people move to the cloud, they start to use ssh keys to authenticate to their cloud instances. This is great, as keys are generally considered more secure than passwords. But, with many new users to ssh, and putty in particular I am seeing a challenge with folks not loading in their keys when windows reboots, and then having issues logging into their cloud instances after a reboot.

Setting pagent up to automatically load keys is fairly straight forward under windows. First you will make a shortcut, that will use the command line to load the keys, and then place the shortcut into the startup folded in windows. Once you have the pagent. You can have multiple ppk files. Name the shortcut and save it. Nowyou can simply run this to start pagent, and have your keys automatically load. But we can make this even easier by putting the shortcut into the startup folder.

Hopefully this was able to make you day just a little bit better. Any questions, feel free to drop me a note in the comments. Your email address will not be published. This site uses Akismet to reduce spam. Learn how your comment data is processed. Skip to content As more and more people move to the cloud, they start to use ssh keys to authenticate to their cloud instances.

To create the initial shortcut, right click on your desktop and select new, and then shortcut. Put in the path to pagent.

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