Oxy
2
Hi
Create an .htaccess file at the root of the subdomain
(under condition that you have a static IP from the VPN)
#Allow only VPN IP
Order Allow,Deny
Allow from 123.456.789.123
Where 123.456.789.123 is VPN IP address.
More info and variations depending on your preferences
mod_authz_host - Apache HTTP Server Version 2.2
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