nginx setup: connection interrupted - nginx

Question

Operating System: Cent OS 6.4 64bit
I installed nginx on my server along with PHP and MySQL, I went through the configuration in the nginx config file, set my server name and listening on port 80.
However, I try to access the server by URL for the first time and I got the error
"The connection to * was interrupted."
Here is my config file from /etc/nginx/conf.d/default.conf (Note: I already set the servername to a subdomain.)
#
# The default server
#
server {
listen 80;
server_name *;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root /usr/share/nginx/html;
index index.php index.html index.htm;
}
error_page 404 /404.html;
location = /404.html {
root /usr/share/nginx/html;
}
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
location ~ \.php$ {
proxy_pass http://127.0.0.1;
}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root /usr.share/nginx/html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
Any ideas why? Or where can I start finding the issue?

Answer 1

Just guessing.
You can't simply run Apache and Nginx on the same machine - both listening on port 80.
Can two applications listen to the same port?
That message means there are issues establishing websocket connections. Check that you have properly configured nginx to allow websocket connections through.
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
Check your logs with
sudo tail -f /var/log/nginx/access.log /var/log/nginx/error.log