Why is nginx displaying the wrong domain?

Question

linux

Good evening.
I have nginx and php-fpm on my server.
I started setting up nginx, wrote 2 configs, they look something like this:
aaa.conf

server {
   listen 80;
   server_name aaa.ru
   .....
}

bbb.conf

server {
   listen 80;
   server_name bbb.ru
   .....
}
server {
   listen 80;
   server_name domain.bbb.ru
   .....
}

So, when I open any non-existent domain on bbb.ru , for example, test.bbb.ru , the site aaa.ru is displayed for me ! How to prevent it? Tell me please.

Answer 1

Finish aaa.

server {
   listen 80;
   server_name aaa.ru *.aaa.ru
   .....
}

Finish bbb

server {
   listen 80;
   server_name domain.bbb.ru
   .....
}


server {
   listen 80;
   server_name bbb.ru *.bbb.ru
   .....
}
}

And set the default server

server {
    listen   80 default_server;
    server_name example.net www.example.net;
    root  на_страницу приветствия или заглушку 
    ...
}