Add a service reference that is hosted in a private VPN to my project
<p><strong>Requirement:</strong> Add a service reference that is hosted in a private VPN to my project.</p>

<p><strong>IDE</strong> Visual Studio 2013 express edition</p>

<p><strong>Language</strong> C#</p>

<p><strong>Framework</strong> MVC 5</p>

<p><strong>Question:</strong> </p>

<ol>
<li>While adding the service reference, where do I specify the credentials to join the VPN?</li>
<li>Should the owners of that VPN whitelist my Ip?</li>
<li>How do we add a service reference that is hosted in a VPN to my Visual Studio MVC.</li>
</ol>

<p><strong>What I did:</strong></p>

<ol>
<li><p>I tried to add the reference by doing the following:</p>

<p>Right clicking on the service reference folder.
         click Add Service Reference.
         Enter URL 
         Click Go   (Did not work)</p></li>
<li><p>I also went through several msdn and stackoverflow articles and couldnot find anything comprehensible.</p></li>
</ol>

<p><strong>Failure messages:</strong></p>

<p>The remote name could not be resolved.</p>

<p>Metadata contains a reference that cannot be resolved.</p>

<p>There was no endpoint listening at  that can accept the message.</p>

<p><strong>Note:</strong> Thanks in advance for helping me out with this. I am new to this and not sure if I am looking in the right places. </p>