I have an IIS8.5 which hosts about 10 Websites. I also have a EV-SSL certificate from GoDaddy and a "normal" SSL Certificate signed by GoDaddy which I use for my sites. To get this working I had to setup SNI and force it to make sure the request of a client opens the correct site.
Now when I go to https://example.com from internal Network, everything works fine. If I do the same from external, it doesn't work. BUT when I go to http://example.com (not https), then I can access the site also from external networks.
If I go to https://example.com from external, I get connected to the server, but I only see the default IIS Page, not my requested Website.
Ports are open on both physical & windows firewall.
Why is that? I guess it's an issue with SNI but I can't get it working. Thanks for your help.