Do you have a dedicated firewall that you wholly control and are comfortable messing with?
If it’s not the cheapest ISP-issued PoS then it very possibly has geo-blocking options. There are ways to know if an IP is commercial or residential but I don’t remember that off the top of my head. Anyway, you’d want to block all commercial IPs outside of Europe.
Do you have a dedicated firewall that you wholly control and are comfortable messing with?
If it’s not the cheapest ISP-issued PoS then it very possibly has geo-blocking options. There are ways to know if an IP is commercial or residential but I don’t remember that off the top of my head. Anyway, you’d want to block all commercial IPs outside of Europe.