CloudFlare CDN (Content Delivery Network) is a popular service that helps improve website performance and security. One feature it offers is the ability to block visitors from specific countries from accessing your website. Here is a step-by-step guide on how to block an entire country using CloudFlare CDN.
Table of Contents
Why Block Countries
There are a few reasons you may want to block visitors from certain countries:
- Comply with legal or licensing restrictions for content in some countries
- Reduce malicious bot traffic and attacks originating from high risk countries
- Conserve server resources by limiting visitors from countries you don’t do business with
Prerequisites
Before blocking countries, make sure:
- You have a CloudFlare account
- Your domain is connected to CloudFlare and using CloudFlare nameservers
- The CloudFlare proxy/CDN service is enabled for your domain
Without these enabled, country blocking rules will not take effect.
Step 1 – Identify Countries to Block
First, identify the countries you wish to block. You can find this in your CloudFlare dashboard:
1. Go to the Firewall section
2. Click on Events
3. Filter by country to see traffic and threats by location
This will show you the visitor traffic and threats from various countries to help decide which ones to block.
Step 2 – Create a CloudFlare Firewall Rule
1. Go to the Firewall section
2. Click on Create Firewall Rule
3. Enter a rule name, for example “Block China Visitors”
4. Set the field to “Country”
5. Select the operator as “Equals”
6. Enter the country codes you want to block, for example “CN” for China
7. Set the action to “Block”
8. Click Deploy Firewall Rule
Repeat to create multiple rules for each country you want to block.
Step 3 – Verify the Blocking Rules
To confirm your firewall rules are working:
1. Go to Firewall > Events
2. Filter logged events by the countries you blocked
3. Check the action to confirm requests were blocked
You will now see all traffic and threats from those countries are blocked by the CloudFlare firewall.
Considerations When Blocking Countries
When blocking entire countries, keep these points in mind:
- Blocking countries could block legitimate visitors and affect user experience
- Maintain an allowlist of trusted IP addresses that need access
- Occasional false positives can happen if IP geolocation is inaccurate
- Monitor events for traffic you still want to allow after blocking
- Adjust rules over time instead of overly strict blocking
Use blocking judiciously for countries representing threats or those you have no business dealings with. For other countries, consider using CAPTCHAs, rate limiting, and other tools to manage bad traffic instead of outright blocking.
Alternative Methods to Block Countries
Some alternative ways to block countries besides using CloudFlare include:
- Using server firewall rules like CSF/LFD, iptables, etc.
- Modifying Nginx/Apache configuration files
- Implementing geoblocking at the application code level
- Using a VPN or proxy service that offers country blocking
However, the CloudFlare approach is easiest and most effective for sites using their CDN service.
Conclusion
Blocking visitor countries can help comply with regulations, improve security, conserve resources, and reduce threats. With CloudFlare’s firewall rules, blocking entire countries is straightforward.
Monitor your traffic over time and tweak rules to balance security with not blocking legitimate visitors. Used judiciously, country blocking can be an effective part of your website security and regulation compliance strategy.
