Sichere Verbindung

[Erwin]

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteCond %{ENV:HTTPS} !=on
RewriteRule .* https://%{SERVER_NAME}%{REQUEST_URI} [R=301,L]

Apache selber empfiehlt redirect statt mod_rewrite:

<If "%{SERVER_PROTOCOL} != 'HTTPS'">
    Redirect "/" "https://%{HTTP_HOST}/"
</If>