Hello,
i have a problem with this code:

if ($host ~* ^[a-z]\.net)
{
rewrite ^/(.*)$ http://www.$domain/$1 permanent;
}


I wanna redirect the domain without subdomain for eg.

mysite.net
mysite2.com
mysite2.org

i not want the redirect when the subdomain is present for eg.

mysub.mysite.net
www.mysite.net

I need dynamic configuration.