RewriteEngine on
ProxyPass          /      http://<your-fqdn-here>/
ProxyPassReverse   /      http://<your-fqdn-here>/

<new-ip-address-of-ec2>   <your-fqdn-here>

a2enmod proxy
a2enmod proxy_http
a2enmod rewrite

RewriteEngine     on
RewriteCond       %{HTTPS} off
RewriteRule       (.*)  https://%{HTTP_HOST}%{REQUEST_URI}

ProxyPreserveHost on
ProxyPass         /     http://123.456.1.1/
ProxyPassReverse  /     http://123.456.1.1/