How to Set Up Cloudflare DNS on Linux (Ubuntu/Debian-Based)

Cloudflare DNS (1.1.1.1) is a fast, secure, and privacy-focused DNS service that improves browsing speed and security. This guide will help you configure Cloudflare DNS on your Linux system, specifically for Ubuntu and Debian-based distributions.

Step-by-step guide to setting up Cloudflare DNS on Ubuntu and Debian-based Linux systems.

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What is Cloudflare DNS?

DNS (Domain Name System) translates domain names into IP addresses. Your internet service provider (ISP) assigns a default DNS, but switching to Cloudflare’s DNS can enhance privacy, security, and speed.

Cloudflare DNS Addresses:

• IPv4:
• Preferred DNS: 1.1.1.1
• Alternate DNS: 1.0.0.1
• IPv6:
• Preferred DNS: 2606:4700:4700::1111
• Alternate DNS: 2606:4700:4700::1001

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How to Set Up Cloudflare DNS on Linux (Ubuntu/Debian-Based)

Method 1: Using GUI (For Desktop Users)

1. Open Network Settings:

• Click on the Settings icon.
• Select Network from the sidebar.

1. Edit Your Connection:

• Click on your active connection (Wi-Fi or Wired).
• Click on the Settings (gear) icon.

1. Change DNS Servers:

• Go to the IPv4 tab.
• Disable Automatic DNS.
• Enter the following Cloudflare DNS servers:
  • 1.1.1.1, 1.0.0.1
• (Optional) In the IPv6 tab, disable Automatic DNS and enter:
  • 2606:4700:4700::1111, 2606:4700:4700::1001

1. Apply Changes:

• Click Apply.
• Disconnect and reconnect to the network for the changes to take effect.

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Method 2: Using Terminal (For Advanced Users)

1. Modify the resolv.conf File (Temporary Method)

1. Open the terminal (Ctrl + Alt + T).
2. Type the following command:

   sudo nano /etc/resolv.conf

3. Replace the existing nameservers with Cloudflare’s:

   nameserver 1.1.1.1
   nameserver 1.0.0.1

4. Press Ctrl + X, then Y, and hit Enter to save the file.
5. Restart the network service:

   sudo systemctl restart networking.service

Note: This method is temporary and resets on reboot.

2. Modify NetworkManager (Permanent Method)

1. Open the NetworkManager configuration file:

   sudo nano /etc/NetworkManager/NetworkManager.conf

2. Add or modify the [main] section to include:

   [main]
   dns=none

3. Save and exit (Ctrl + X, then Y, and Enter).
4. Now, edit the DNS configuration:

   sudo nano /etc/systemd/resolved.conf

5. Uncomment and modify the DNS= line:

   DNS=1.1.1.1 1.0.0.1

6. Restart NetworkManager:

   sudo systemctl restart NetworkManager

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How to Verify Cloudflare DNS is Working

To check if your system is using Cloudflare DNS:

1. Open the terminal and run:

   nslookup google.com

2. If the output shows 1.1.1.1 or 1.0.0.1, Cloudflare DNS is active.
3. Alternatively, visit https://1.1.1.1/help in your browser.

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Why Use Cloudflare DNS?

✅ Faster Browsing – Cloudflare DNS is one of the fastest in the world. ✅ Better Privacy – Cloudflare does not track or log your browsing data. ✅ Increased Security – Helps protect against phishing and cyber threats.

By following these steps, you can easily switch to Cloudflare DNS on your Ubuntu or Debian-based Linux system and enjoy a faster, safer, and more private internet experience!

Let us know in the comments if you have any questions or need further assistance.