Wordpress Secure Login Redirect

[genarg]

Hi. I wanted to enable ssl on nginx for using to login to wordpress and
the admin panel.

I have a ssl certifcate that uses secure.DOMAIN.com. My Wordpress
configuration is with Network enabled.
http://codex.wordpress.org/Create_A_Network#Apache_Virtual_Hosts_and_Mod_Rewrite.

The website works like this:

www.DOMAIN.com (Main blog, points to others blogs)
subdomain1.DOMAIN.com (blog 1)
sub2.DOMAIN.com (blog 2)

What I want to force is a secure SSL connection for login in and
administration for each subdomain.
http://codex.wordpress.org/Administration_Over_SSL

How do I change the configuration in nginx to work like that?

Here is my current nginx.conf and website.conf files.

nginx.conf file:

user              nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log;
#error_log  /var/log/nginx/error.log  notice;
#error_log  /var/log/nginx/error.log  info;

pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local]
"$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    tcp_nopush     off;
    tcp_nodelay	on;
    keepalive_timeout  30;
    client_body_buffer_size  1K;
    client_header_buffer_size 1k;
    client_max_body_size 12M;
    large_client_header_buffers 2 1k;

    gzip  on;
    gzip_comp_level 2;
    gzip_http_version 1.1;
    gzip_vary on;
    gzip_proxied any;
    gzip_types text/plain text/css image/x-icon image/png image/jpg
image/jpeg text/js text/php application/xhtml application/xhtml+xml;
    gzip_buffers 16 8k;
    gzip_disable "MSIE [1-6].(?!.*SV1)";
    
    include /etc/nginx/conf.d/*.conf;
}

website.conf file:
server {
	server_name www.domain.com secure.domain.com *.domain.com;

	root /www/domain.com;

	index index.php index.html;
	
	error_page 404 = @wordpress;
	log_not_found off;

	location ^~ /files/ {
		rewrite /files/(.+) /wp-includes/ms-files.php?file=$1 last;
	}
	location @wordpress {
		fastcgi_pass 127.0.0.1:9000;
		fastcgi_param SCRIPT_FILENAME $document_root/index.php;
		include fastcgi_params;
		fastcgi_param SCRIPT_NAME /index.php;
	}

	# Rewrite minified CSS and JS files
    rewrite
^/wp-content/w3tc/min/([a-f0-9]+)\/(.+)\.(include(\-(footer|body))?(-nb)?)\.[0-9]+\.(css|js)$
/wp-content/w3tc/min/index.php?tt=$1&gg=$2&g=$3&t=$7 last;
            
    set $cache_uri $request_uri;
    
    if ($request_method = POST) {
        set $cache_uri 'no cache';
    }   
    if ($query_string != "") {
        set $cache_uri 'no cache';
    }   
    
    if ($request_uri ~*
"(\/wp-admin\/|\/xmlrpc.php|\/wp-(app|cron|login|register|mail)\.php|wp-.*\.php|index\.php|wp\-comments\-popup\.php|wp\-links\-opml\.php|wp\-locations\.php)")
{
        set $cache_uri "no cache";
    }
    
    if ($http_cookie ~*
"comment_author|wordpress_[a-f0-9]+|wp\-postpass|wordpress_logged_in")
{
        set $cache_uri 'no cache';
    }
    
    location / {
        try_files /wp-content/w3tc/pgcache/$cache_uri/_index.html $uri
$uri/ /index.php;
    }

    location ~*
\.(xml|ogg|ogv|svg|svgz|eot|otf|woff|mp4|ttf|css|rss|atom|js|jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav|bmp|rtf)$
{
        try_files       $uri =404;
        expires         max;
        access_log      off;
    }
    
    location ~* /\.ht {
        deny            all;
        access_log      off;
        log_not_found   off;
    }

	location ~ \.php$ {
		try_files $uri @wordpress;
		fastcgi_index index.php;
		fastcgi_pass 127.0.0.1:9000;
		fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
		include fastcgi_params;
	}
	location ^~ /blogs.dir/ {
		internal;
		root /home/domain.com/wp-content;
	}
}

server {
	listen       443;
	server_name  www.domain.com secure.domain.com *.domain.com;

	ssl                  on;
	ssl_certificate      /etc/ssl/domain_com/domain_com.crt;
	ssl_certificate_key  /etc/ssl/domain_com/domain_com.key;
	
	ssl_session_timeout  5m;
	
	ssl_protocols  SSLv2 SSLv3 TLSv1;
	ssl_ciphers 
ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
	ssl_prefer_server_ciphers   on;

	location / {
		root   html;
		index  index.html index.htm;
	}
}

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,212916,212916#msg-212916