How do I block a country or countries in Threat Control?

You can block countries in your Threat Control panel. 

Steps:

1. Scroll down to Add custom rule.

2. Start typing in the country name and then select the country.

3. Click on the "Block" button.

Notes:

CloudFlare's country block currently only serves up a challenge page to visitors from the countries you decide to block. A human visitor could still enter your site from that country by passing the challenge page, so a country block is not a full block. If you fully want to block visitors from that country, then you would have to put rules on your server to block the country fully.

A future version of CloudFlare's Threat Control will likely allow for a full block.