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PuTTY tools

Generate SSH key on Windows with PuTTYgen

A way to generate a SSH key under Windows is with help of PutTTY-gen. PuTTYgen can be downloaded at http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html or directly downloaded from http://the.earth.li/~sgtatham/putty/latest/x86/puttygen.exe .

  • Start PuTTYgen
  • In the field "Type of key to generate", please select "SSH-2 RSA".

puttygen_default

  • Click on "Generate".

puttygen_random

  • Move your pointer under the bar and move the mouse in this field until the bar is completely green.

puttygen_done

  • Fill in a passphrase in the "Key passphrase" field. A passphrase is the same as a password, but in general it contains more characters. Repeat the same passphrase in the "Confirm passphrase" field. It is possible to not use a passphrase, but this is not considered as good practice in terms of security.
  • Save your private key at a secure spot (never share this file!) with the "Save Private Key". The extension of the file must be .ppk. You need this file later on to login to your machine.
  • Save also your public key with the "Save Pubilic Key". The extension of the file should be .pub. You need this file later on to copy to your UI profile.
  • Select all text from the "Public key for pasting into OpenSSH authorized_keys file" and copy paste this in OpenNebula UI profile.

SSH access from a Windows PuTTY client

A well known SSH client for Windows is PuTTY.

Note: You can download Putty here.

This client only works with a terminal and does not support a graphical user interface out of the box.

To login to your VM:

  1. start Putty
  2. Fill in the Host Name (or IP address) the Host Name (or IP address) e.g. vmname.projectname-institute.vm.surfsara.nl or 145.100.XX.XX
  3. Select Connection ->Data on the left hand panel
  4. Fill in your user name at Auto-login username (for the first time you start a VM this should be root )
  5. Select Connection->SSH->Auth on the left-hand panel
  6. Select your private key by selecting the browse button and navigate to your private key (with the .ppk extension)
  7. Select Session on the left-hand panel
  8. Save the session by giving it a name under saved sessions and click on the save button.
  9. Click the Open button.
  10. In case you have set a passphrase on your certificate, you will have to fill it in.
  11. Now you are logged on to your VM

Note: The first time you start a session to a VM a warning is given that the machine is not cached. Select yes to continue the session.