My site not open when i enable cloudflare

dear sir/mam my website not open please help

Dear Sir , actually i had disable all country in my firewall only my country is enable because china doing alot of bad acitvity sending malware and also trying to hack my website. so i had disable the all country in firewall , so might be this is the issue of my website not open , so how to know the country of my cloudlfare ip so that i can enable

If you have a firewall at your host, make sure you allow these IP addresses: