My website has an SSL cert (example url: https://subdomain.example.com). Under Apache it's set up for both port 80 and port 443. So under the following configuration, anyone who goes to http://subdomain.example.com is sent to https://subdomain.example.com . But for visits from Internet Explorer, the redirect doesn't happen. Instead, http visits get a "Internet Explorer cannot display the web page." with a list of client-side solutions to try.

Any ideas on how to fix the config so IE visits have the same behavior as the other browsers (that is, send http to https automatically)?

NameVirtualHost *:443

<VirtualHost *:80>
  DocumentRoot /var/www/somewebroot
  ServerName subdomain.example.com
</VirtualHost>

<VirtualHost *:443>
     DocumentRoot /var/www/somewebroot
     ServerName subdomain.example.com
    #   SSL CERTS HERE
</VirtualHost>

*Tested IE8, IE9 beta