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  84                   <h2>Setting up PuTTY to do passwordless logins using pre-shared key</h2>
  85
  86 <p>Seems I've been here before: <a href="http://cygwin.com/ml/cygwin/2012-01/msg00284.html">http://cygwin.com/ml/cygwin/2012-01/msg00284.html</a></p>
  87
  88 <p>This site seems helpful: <a href="https://support.hostgator.com/articles/specialized-help/technical/ssh-keying-through-putty-on-windows-or-linux">
  89 https://support.hostgator.com/articles/specialized-help/technical/ssh-keying-through-putty-on-windows-or-linux</a></p>
  90
  91 <h2>Generating your ssh keys</h2>
  92
  93 <p>You need to use PuttyGen to generate your ssh keys to share.
  94 One problem is that Putty does it's own form of ssh keys which is non-standard or at least non-Unix like. Once you install PuttyGen you should generate your key. SSH-2 DSA is more secure than the default SSH-2 RSA keys so toggle that on then do generate,
  95 then move the cursor around the blank area. PuTTYgen uses this movement to generate the key's randomness.</p>
  96
  97 <p><img src="PuttyKeyGenerator.png"></p>
  98
  99 <p>Once this is generated, you can set a key comment, or a passphrase. The comment isn't important, as it's just a label, but the passphrase will require that you enter this passphrase when using the key. If you're trying to have a "passwordless login" then this should be left blank.</p>
 100
 101 <p><img src="PuttyKeyGenerator2.png"></p>
 102
 103 <p>Now click Save Public Key, and save this file to a name of your choosing somewhere safe on your hard drive. Please remember the location of this file, as it is needed later. Then do the same for Save Private Key.</p>
 104
 105 <h2>Installing your ssh keys into the server</h2>
 106
 107 <p>Now that we have the keys generated and saved, we need to getthe keys on the server. Copy the data inside the putty window under Public Key for pasting into SSH authorized keys file. The key appears to be to put these keys into your ~/.ssh/authorized_keys2 file not you're ~/.ssh/authorized_keys file. You want to putthis into your NFS home directory not your Windows home directory. Why we maintain two different sets of home directories is unknown.
 108
 109 <blockquote>
 110   <p><b>Note:</b> If you don't have a .ssh directory on your Unix/Linux machines then execute ssh-keygen -t dsa on Linux to create that and your DSA keys.</p>
 111
 112   <p><b>Note 2:</b> If a Linux machine does not use your NFS mounted home directory then you'll have to duplicate your home environment and things like ~/.ssh on the machines that do not share your one home directory.</p>
 113 </blockquote>
 114
 115 <p>Make sure your ~/.ssh/authorized_keys2 is set to 600.</p>
 116
 117 <h2>Setting up colored sessions for PuTTY and tying that to shortcuts</h2>
 118
 119 <p>It's best to set up sessions in putty. A session is merely a set of configuration parameters tied to a name. We will create sessions for different types or categories of machines then invoke them with different machine names. We will set up session for dev/test/prod environments.</p>
 120
 121 <p>In putty do the following:</p>
 122
 123 <ul>
 124   <li>Window: Lines of scrollback - you might want to set this to something larger than 200 like maybe 2000.</li>
 125
 126   <li>Window: Colours: Set Default Background and Default Bold Background to some color. You may want to use a theme of dev blue, test 3D orange and prod red, for example. I also change Default Foreground to a solid white and Default Bold Foreground to a bright yellow. This setting will be the main setting to change between dev/test and prod.</li>
 127
 128   <li>Connection: Data: Auto-login username. Set this to your username (e.g. adefaria)</li>
 129
 130   <li>Connection: SSH: Auth: Private key file for authentication: Browse to where you put your generated Putty Private Key.</li>
 131
 132   <li>Connection: SSH: X11 - toggle on Enable X11 forwarding. Consider installing Cygwin's Xorg server</li>
 133 </ul>
 134
 135 <p>Then go back to the Session page and enter a name for your Saved Session and click save. Next you can change that name, go toConnection: Colours, set up your color scheme for test or prod and save those sessions. Now you have dev/test and prod sessions
 136  colored to your liking.</p>
 137
 138 <h2>Executing PuTTY sessions</h2>
 139
 140 <p>Now you can set up shortcuts to use these saved session parameters but apply them to different machines like so:</p>
 141
 142 <blockquote>
 143   <tt>C:\Program Files\Putty\Putty.exe -load dev cm-job-ldev01</tt><br>
 144   <tt>C:\Program Files\Putty\Putty.exe -load test cm-job-ltest01</tt><br>
 145 <br>
 146 </blockquote>
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