Multiple custom micro sites, how to shut them down during maintenance?
<p>I have multiple smallish micro-sites that are all custom built, none of them is built on any common codebase (legacy).</p>

<p>During maintenance, when I need to bring these sites down it is a manually process setting up a custom page that it redirects to when things are getting updated during the downtime.</p>

<p>I want to build a common library that I can drop into each site to control things at a global level to switch sites on/off.</p>

<p>What would you suggest I do to do this?</p>
