title: Azure Functions and restricting IPs
body: <p>I would really like to use Azure Functions for an upcoming project, but is there a way to create a whitelist of IPs like in ipSecurity in Web.Config? </p>
  
  <p>They are using <code>authLevel</code> function, so there is some protection there. My customer has a security requirement for a whitelist.</p>
  
  <p>Looking at the resource explorer there seems to be a property <em>ipSecurityRestrictions</em> that might work, but I don't see it on my Azure function instance.</p>