If you only modify the DocumentRoot of the default configuration file, it will respond to all http requests of port 80 by default, which means that any first-level, second-level, multi-level domain names, and all IPs can access the website.
If it is a virtual machine VirtualHost, you can add
ServerAlias *.oo.xx
To achieve the binding of all oo.xx second-level domain names.
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This depends on the specific configuration.
If you only modify the DocumentRoot of the default configuration file, it will respond to all http requests of port 80 by default, which means that any first-level, second-level, multi-level domain names, and all IPs can access the website.
If it is a virtual machine
VirtualHost, you can addTo achieve the binding of all
oo.xxsecond-level domain names.