Redirecting non-www to www in Nginx

Edit your virtualhost file and replace yourdomain.com with www.yourdomain.com and add this at the top:

server {
    listen 80;
    server_name yourdomain.com;

    return 301 http://www.yourdomain.com$request_uri;
}

Restart nginx:

sudo service nginx restart

Finally, add a CNAME record with the name of “www” and the hostname of “@”.

I followed your guideline. But still it is not redirecting. Do I need to wait few hours for adding CNAME to take effect?

P.S.: vhost config: http://tny.cz/8fa87c05

Is this a PTR records issue? I set it to the same as hostname.

$hostname phpBB

Do I need to set PTR records to something different from above?