title: SNI and SSL on IIS 8.5
body: <p>I have a website running on IIS that requires two SSL certificates, one for the main website domain, and one for the traffic coming through a CDN (the assets are served from a different domain name). Both use SSL.</p>
  
  <p>I therefore used the Server Name Indication option when creating the HTTPS bindings in IIS.</p>
  
  <p>The site works fine, I know that users on IE6/Windows XP may experience an issue, but we don't have any/many users visiting our site using that combination so that's not a problem. However, it is an ecommerce site that receives postbacks/callbacks from both PayPal and WorldPay. Here is where we are experiencing an issue. It would seem that neither PayPal or WorldPay's mechanism for posting back payment information understands SNI, therefore we don't get notified that a payment has been made.</p>
  
  <p>I'm not sure what the options are. IIS is telling me to create a default SSL site, but I can't find any instructions online regarding what I should be creating, or what benefit it serves.</p>
  
  <p>Am I going down the right path with this? Can anyone offer any advice on a) whether a default SSL site will fix this issue and b) how to create the default SSL site?</p>
  
  <p>Thanks for your time in advance.</p>
  
  <p>Kind regards,
  Dotdev</p>