SharePoint 2010/2013 Automatic redirect from http to https

IIS 7.0+ Microsoft URL Rewrite Module is not available by default, you must need to download and install on all SharePoint front end servers

in this example i am using url.

http://portal.eteam.local
https://portal.etam.local.

Microsoft URL Rewrite Module 

SharePoint Settings :

SharePoint Web application alternative access mapping must be configured properly for HTTP and HTTPS.

1. open Central administration , 
2. Click on application management 
3. click on alternative Access mapping 
4. select particular application
5. please verify all the url for the web application