I have a bit of an issue with our new Sharepoint (2013) server.
The internal use through http is working just fine with SSO.
With the external access I have an issue. We have an SSL certificate, which is impemented. I have added a Virtual Webserver and a Real Webserver for the site, with the certificate and with a Firewall Profile, on which nothing is activated.
I can reach the server from an external location, but I have to enter and apply my user data (username, pw) about 10 times before the page shows normally.