HTTP service URL for system external IP detection
This option specifies the HTTP service URL used to detect the system’s external
IP address. It queries a web service to retrieve the public IP of this system.
By default, the URL is set to
https://software.virtualmin.com/cgi-bin/ip.cgi.
You can also use other services like https://ifconfig.me or
https://icanhazip.com. Furthermore, you can specify separate URLs for
IPv4 and IPv6 detection by separating them with a space, such as
https://api.ipify.org https://api6.ipify.org.