nginx取消其他域名绑定

vi /etc/nginx/sites-available/default

server {
        listen 80 default_server;
        listen [::]:80 default_server ipv6only=on;

        root /usr/share/nginx/html;
        index index.html index.htm index.php;

        # Make site accessible from http://localhost/
        server_name _;
        rewrite ^(.*) http://your-default-domain permanent;
        return 404;
        ..
}