Resolution of 400 error for non-filed domain names in nginx

If an error is reported for an unregistered domain name in nginx 400, the default page is returned as long as the domain name is resolved to the nginx server. To return error 400 for a domain name that has not been filed, you must manually add a configuration file, such as 400. conf, the content is as follows: server {... if an error is reported for an unregistered domain name in nginx 400, the default page is returned as long as the domain name is resolved to the nginx server. To return error 400 for a domain name that has not been filed, you must manually add a configuration file, such as 400. conf. the content is as follows: server {listen 80 default; server_name _; return 400;} and then include the configuration file to the main configuration file nginx. conf: include 400. conf; reload ngjinx. Server_name _; indicates the wildcard domain name configuration. by default, the error 400 is returned for all domain names, unless the domain name is bound to the main configuration file nginx. conf or other configuration files.