how to disable direct access to a web site by ip address

Question

I have a website on a VPS.

The issue I am having is that when I enter the IP of the server, it links to the website.
Even when entering mail.domain.com, it does the

Answer 1

You may try to set the server IP address in:

/etc/nginx/conf.d/default.conf

So it looks like this:

server {
    listen 80;
    server_name localhost IP.OF.VPS.HERE;

Then you can specify the subdomain vhost, like:

server {
        listen 80;
        server_name subdomain.domain.com;

And the main domain, like:

server {
        listen 80;
        server_name www.domain.com domain.com;

Then restart Nginx:

/etc/init.d/nginx restart

Each vhost should have its own *.conf file (for better organization), like:

/etc/nginx/conf.d/subdomain.domain.com.conf
/etc/nginx/conf.d/domain.com.conf
/etc/nginx/conf.d/default.conf

Answer 2

if ($http_host != "example.com") {
    return 301 https://example.com;
}