假设服务器有一个公共 ip 地址，并且被设置为服务虚拟主机，你可以这样做:

Assuming that the server has one public ip address, and been set up to serve virtual hosts, you can do that like this:

curl -H "Host: subdomain.domain.com" IPADDRESS

curl -H "Host: subdomain.domain.com" IPADDRESS