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    copied!<p>When a port is not specified for RavenDb it will go out and attempt to find it's own, it does this by calling <em>IPGlobalProperties.GetActiveTcpListeners()</em>.</p> <p><a href="https://github.com/ravendb/ravendb/blob/master/Raven.Database/Util/PortUtil.cs" rel="noreferrer">RavenDb | PortUtil.cs</a></p> <pre><code>var activeTcpListeners = IPGlobalProperties .GetIPGlobalProperties() .GetActiveTcpListeners(); </code></pre> <p>Calling <a href="http://msdn.microsoft.com/en-us/library/system.net.networkinformation.ipglobalproperties.getactivetcplisteners.aspx" rel="noreferrer">GetActiveTcpListeners()</a> intern calls the Win32 function <strong>GetTcpTable()</strong> which attempts to enumerate all of the possible port combinations on the host. For obvious reasons, it would not be a good scenario to allow folks to do port scanning within Windows Azure Web Sites. Which means the <strong>GetTcpTable</strong> operation fails and when something fails in the world of development we throw an exception.</p> <p>In this particular case the exception is a <a href="http://msdn.microsoft.com/en-us/library/system.net.networkinformation.networkinformationexception.aspx" rel="noreferrer">NetworkInformationException</a> which is raised do to the security permissions neglecting the call to <strong>GetTcpTable</strong>. This is why it results in an Access Denied message.</p> <p><strong>tl;dr</strong></p> <p>Add a default port to your web.config appsettings section:</p> <pre><code> &lt;appSettings&gt; &lt;add key="Raven/Port" value="*"/&gt; &lt;!-- Add real tcp port # --&gt; &lt;add key="Raven/DataDir" value="~\Data"/&gt; &lt;add key="Raven/AnonymousAccess" value="Get" /&gt; &lt;/appSettings&gt; </code></pre>
 

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