HTTP service URL for system external IP detection
Use this field to find your server's public IPs—IPv4 and IPv6—using a web
service. If your server uses IPv6, enter two URLs separated by a space: one for
IPv4-only and one for IPv6-only. If not, enter just the IPv4 URL.
The default pair is https://v4.download.virtualmin.com/
https://v6.download.virtualmin.com/. You can also use other
services like https://api.ipify.org https://api6.ipify.org.