These settings allow site owners to restrict access to the site by IP
address of the visitor (Deny access to the site) by denying and
allowing access from certain IP addresses.
Note: Subdomains have their own web server settings, therefore, when you
change web server settings for a site that has subdomains, the
subdomains will not receive these changes.
If you do not find the necessary setting, contact your server
administrator (hosting provider), who can set up more custom settings
for websites.