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Automate a Remote Login Using SSH-Agent
prostoalex
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8-2-2008 12:18 AM
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tags:
linux
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ssh
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/2416bb00-c075-4dcd-8615-6523a3c0be80/A55D1420-27BA-409C-8F35-A906ED7489A4/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.webmonkey.com/tutorial/Automate_a_Remote_Login_Using_SSH-Agent?oldid=23112" href="http://www.webmonkey.com/tutorial/Automate_a_Remote_Login_Using_SSH-Agent?oldid=23112" style="font-size: 11px;">www.webmonkey.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.webmonkey.com/tutorial/Automate_a_Remote_Login_Using_SSH-Agent?oldid=23112"><P>When it comes to remote logins, SSH is a wonderful tool. Not only is it secure, it supports public/private key logins. Depending on public and private keys mean even if someone gets your password, without your private key it won't do them any good (and vice versa). </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.webmonkey.com/tutorial/Automate_a_Remote_Login_Using_SSH-Agent?oldid=23112"><P>However, if you've ever wanted to automate a remote login or to copy some files for backup purposes, you know that it's not easy to do an SSH login without a password. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.webmonkey.com/tutorial/Automate_a_Remote_Login_Using_SSH-Agent?oldid=23112"><P>The easiest option would be creating a key pair without a password. Easy, yes. But this is one of the worst ideas you could implement. It effectively destroys one of the primary benefits of using SSH since taking control of the local machine can potentially give an attacker instant and easy access to your remote machine as well -- two for the price of one. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.webmonkey.com/tutorial/Automate_a_Remote_Login_Using_SSH-Agent?oldid=23112"><P>The far better option is to use ssh-agent, which is far more secure and doesn't require you to abandon the added protection of using a password with your SSH keys. </P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/A55D1420-27BA-409C-8F35-A906ED7489A4/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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