IT and Engineer web site
Palo Alto permit to read proper .txt file exposed through https/http website (usually IIS) to import IP list to that must blacklisted
I am taking note about official article:
https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-admin/policy/use-an-external-dynamic-list-in-policy/configure-the-firewall-to-access-an-external-dynamic-list