Heres a step-by-step guide to setting up Quad9 DNS:

Quad9 DNS is a tool used to set up and manage DNS records for a domain name, usually "quad9.com". It allows you to route requests to your desired domain, and it's widely used by developers, businesses, and governments for various purposes, such as routing internet traffic, providing a centralized domain for certain applications, or managing public resources. Setting up Quad9 DNS involves several steps, including creating DNS records, configuring DNS settings, and ensuring security.

Create a DNS Server

First, you'll need to create a DNS server. You can use a web server like Apache, Nginx, or even a DNS server like zoneful or zoneguru. For this guide, I'll use Apache as an example.

Step 1.1: Create a DNS Server

1. Install Apache (or Nginx) on your system.
2. Create a new Apache server with the following command:

   sudo systemctl create dnsmask
   sudo systemctl enable dnsmask
   sudo systemctl enable all
   sudo systemctl enable dnsmask -to Taiwan (x1)
   sudo systemctl enable dnsmask -to Southeast Asia (x2)
   sudo systemctl enable dnsmask -to Asia (x3)
   sudo systemctl enable dnsmask -to Europe (x4)
   sudo systemctl enable dnsmask -to America (x5)
   sudo systemctl enable dnsmask -to Germany (x6)
   sudo systemctl enable dnsmask -to Japan (x7)
   sudo systemctl enable dnsmask -to India (x8)
   sudo systemctl enable dnsmask -to South America (x9)
   sudo systemctl enable dnsmask -to Russia (xA)
   sudo systemctl enable dnsmask -to United States (xB)
   sudo systemctl enable dnsmask -to China (xC)
   sudo systemctl enable dnsmask -to Brazil (xD)
   sudo systemctl enable dnsmask -to India (xE)
   sudo systemctl enable dnsmask -to South America (xF)
   sudo systemctl enable dnsmask -to Russia (x1)
   sudo systemctl enable dnsmask -to United States (x11)
   sudo systemctl enable dnsmask -to China (x12)
   sudo systemctl enable dnsmask -to Taiwan (x13)
   sudo systemctl enable dnsmask -to Southeast Asia (x14)
   sudo systemctl enable dnsmask -to Asia (x15)
   sudo systemctl enable dnsmask -to Europe (x16)
   sudo systemctl enable dnsmask -to America (x17)
   sudo systemctl enable dnsmask -to Germany (x18)
   sudo systemctl enable dnsmask -to Japan (x19)
   sudo systemctl enable dnsmask -to India (x1A)
   sudo systemctl enable dnsmask -to South America (x1B)
   sudo systemctl enable dnsmask -to Russia (x1C)
   sudo systemctl enable dnsmask -to United States (x1D)
   sudo systemctl enable dnsmask -to China (x1E)
   sudo systemctl enable dnsmask -to Taiwan (x1F)
   sudo systemctl enable dnsmask -to Southeast Asia (x2)
   sudo systemctl enable dnsmask -to Asia (x21)
   sudo systemctl enable dnsmask -to Europe (x22)
   sudo systemctl enable dnsmask -to America (x23)
   sudo systemctl enable dnsmask -to Germany (x24)
   sudo systemctl enable dnsmask -to Japan (x25)
   sudo systemctl enable dnsmask -to India (x26)
   sudo systemctl enable dnsmask -to South America (x27)
   sudo systemctl enable dnsmask -to Russia (x28)
   sudo systemctl enable dnsmask -to United States (x29)
   sudo systemctl enable dnsmask -to China (x2A)
   sudo systemctl enable dnsmask -to Taiwan (x2B)
   sudo systemctl enable dnsmask -to Southeast Asia (x2C)
   sudo systemctl enable dnsmask -to Asia (x2D)
   sudo systemctl enable dnsmask -to Europe (x2E)
   sudo systemctl enable dnsmask -to America (x2F)
   sudo systemctl enable dnsmask -to Germany (x3)
   sudo systemctl enable dnsmask -to Japan (x31)
   sudo systemctl enable dnsmask -to India (x32)
   sudo systemctl enable dnsmask -to South America (x33)
   sudo systemctl enable dnsmask -to Russia (x34)
   sudo systemctl enable dnsmask -to United States (x35)
   sudo systemctl enable dnsmask -to China (x36)
   sudo systemctl enable dnsmask -to Taiwan (x37)
   sudo systemctl enable dnsmask -to Southeast Asia (x38)
   sudo systemctl enable dnsmask -to Asia (x39)
   sudo systemctl enable dnsmask -to Europe (x3A)
   sudo systemctl enable dnsmask -to America (x3B)
   sudo systemctl enable dnsmask -to Germany (x3C)
   sudo systemctl enable dnsmask -to Japan (x3D)
   sudo systemctl enable dnsmask -to India (x3E)
   sudo systemctl enable dnsmask -to South America (x3F)
   sudo systemctl enable dnsmask -to Russia (x4)
   sudo systemctl enable dnsmask -to United States (x41)
   sudo systemctl enable dnsmask -to China (x42)
   sudo systemctl enable dnsmask -to Taiwan (x43)
   sudo systemctl enable dnsmask -to Southeast Asia (x44)
   sudo systemctl enable dnsmask -to Asia (x45)
   sudo systemctl enable dnsmask -to Europe (x46)
   sudo systemctl enable dnsmask -to America (x47)
   sudo systemctl enable dnsmask -to Germany (x48)
   sudo systemctl enable dnsmask -to Japan (x49)
   sudo systemctl enable dnsmask -to India (x4A)
   sudo systemctl enable dnsmask -to South America (x4B)
   sudo systemctl enable dnsmask -to Russia (x4C)
   sudo systemctl enable dnsmask -to United States (x4D)
   sudo systemctl enable dnsmask -to China (x4E)
   sudo systemctl enable dnsmask -to Taiwan (x4F)
   sudo systemctl enable dnsmask -to Southeast Asia (x5)
   sudo systemctl enable dnsmask -to Asia (x51)
   sudo systemctl enable dnsmask -to Europe (x52)
   sudo systemctl enable dnsmask -to America (x53)
   sudo systemctl enable dnsmask -to Germany (x54)
   sudo systemctl enable dnsmask -to Japan (x55)
   sudo systemctl enable dnsmask -to India (x56)
   sudo systemctl enable dnsmask -to South America (x57)
   sudo systemctl enable dnsmask -to Russia (x58)
   sudo systemctl enable dnsmask -to United States (x59)
   sudo systemctl enable dnsmask -to China (x5A)
   sudo systemctl enable dnsmask -to Taiwan (x5B)
   sudo systemctl enable dnsmask -to Southeast Asia (x5C)
   sudo systemctl enable dnsmask -to Asia (x5D)
   sudo systemctl enable dnsmask -to Europe (x5E)
   sudo systemctl enable dnsmask -to America (x5F)
   sudo systemctl enable dnsmask -to Germany (x6)
   sudo systemctl enable dnsmask -to Japan (x61)