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nslu:wakeonlan [2009/11/27 17:54] (current)
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 +====== Wake on LAN ======
  
 +This is a simple way that you can use the NSLU to boot up your PCs remotely via a web page. This can be useful for occasions such as needing remote access to a PC when it is switched off.  As the NSLU is on 24/7 we use this small device to wake the others.
 +
 +The NSLU will need to be on the same LAN as the PC, and the PC will need to be configured with WakeOnLan capability enabled.
 +
 +  * Login as root using SSH
 +  * Install haserl and wakelan ​
 +
 +<​code>​
 +ipkg install haserl
 +ipkg install wakelan
 +ipkg install lighttpd
 +</​code>​
 +
 +Add the following text to the file, substituting the 00:​12:​34:​56:​78:​90 for the MAC address of the target PC. You may also change the displayed text if you wish.
 +
 +Place this code somewhere in you DocumentRoot for lighttpd its: /​opt/​share/​www/​lighttpd
 +<​code>​
 +# wakeup-pc.hs
 +content-type:​ text/html
 +
 +<​h2>​Sent wake-up command to PC</​h2>​
 +<? /​opt/​bin/​wakelan 00:​12:​34:​56:​78:​90 ?>
 +</​code>​
 +
 +Configure you web server I'm using LIGHTTPD for its size and capability. ​ Enable MOD_CGI and all files with the .hs extension as haserl CGI scripts.
 +<​code>​
 +cgi.assign = ("​.hs"​ => "/​opt/​bin/​haserl"​)
 +</​code>​
 +
 +Now just point your browser at http://​nslu/​wakeup-pc.hs and your server will magically turn itself on.
 +
 +There are bells and whistles that could be added to the script however this should be enough to provide basic functionality and get you on your way.
 +
 +Taking the example a little further you can construct a nice STATUS display using something like this:
 +<​code>​
 +ipkg install arping
 +</​code>​
 +CSS: Stylesheet for the table {{:​nslu:​wol-style.zip|}}
 +
 +Table design adapted from: http://​veerle.duoh.com/​index.php/​blog/​comments/​a_css_styled_table
 +
 +{{:​nslu:​wol-status.png|}}
 +<​code>​
 +content-type:​ text/html
 +
 +<?
 +check() {
 +  /​opt/​sbin/​arping -c1 -q $1
 +  if [ $? -ne 0 ]; then
 +    echo DOWN
 +  else
 +   echo UP
 +  fi
 +}
 +linkage() {
 +  echo wake-$1.hs
 +}
 +?>
 +<​html>​
 +  <​head>​
 +    <​title>​Server State</​title>​
 +    <link rel="​stylesheet"​ href="​style.css">​
 +  </​head>​
 +  <​body>​
 +    <​table>​
 +     <​caption>​Server status</​caption>​
 +     <​tr><​th>​Server</​th><​th>​Status</​th><​th>​Action</​th></​tr>​
 +     <? for i in cheese bingo wombat; do ?>
 +     <​tr><​td><?​ echo $i ?></​td><​td>​ <? check $i ?> </​td><​td><​a href=<? linkage $i ?>>​Wakeup</​a></​td></​tr>​
 +     <? done ?>
 +   </​table>​
 +  </​body>​
 +</​html>​
 +</​code>​
 +
 +===== Reference =====
 +
 +  * http://​www.nslu2-linux.org/​wiki/​HowTo/​WakeOnLAN
 +  * http://​www.nslu2-linux.org/​wiki/​Optware/​Haserl
 +
 +{{tag>​nslu2 network}}