Nginx – Configure Nginx as reverse proxy with upstream SSL

I try to configure an Nginx server as a reverse proxy so the https requests it receives from clients are forwarded to the upstream server via https as well.

Here's the configuration that I use:

http {

    # enable reverse proxy
    proxy_redirect              off;
    proxy_set_header            Host            $http_host;
    proxy_set_header            X-Real-IP       $remote_addr;
    proxy_set_header            X-Forwared-For  $proxy_add_x_forwarded_for;

    upstream streaming_example_com 
    {
          server WEBSERVER_IP:443; 
    }

    server 
    {
        listen      443 default ssl;
        server_name streaming.example.com;
        access_log  /tmp/nginx_reverse_access.log;
        error_log   /tmp/nginx_reverse_error.log;
        root        /usr/local/nginx/html;
        index       index.html;

        ssl_session_cache    shared:SSL:1m;
        ssl_session_timeout  10m;
        ssl_certificate /etc/nginx/ssl/example.com.crt;
        ssl_certificate_key /etc/nginx/ssl/example.com.key;
        ssl_verify_client off;
        ssl_protocols        SSLv3 TLSv1 TLSv1.1 TLSv1.2;
        ssl_ciphers RC4:HIGH:!aNULL:!MD5;
        ssl_prefer_server_ciphers on;


        location /
        {
            proxy_pass  https://streaming_example_com;
        }
    }
}

Anyway, when I try to access a file using reverse proxy this is the error I get in reverse proxy logs:

2014/03/20 12:09:07 [error] 4113079#0: *1 SSL_do_handshake() failed
(SSL: error:1408E0F4:SSL routines:SSL3_GET_MESSAGE:unexpected message)
while SSL handshaking to upstream, client: 192.168.1.2, server:
streaming.example.com, request: "GET /publishers/0/645/_teaser.jpg
HTTP/1.1", upstream:
"https://MYSERVER.COM:443/publishers/0/645/_teaser.jpg", host:
"streaming.example.com"

Any idea what I am doing wrong?