How To Install Varnish Cache 6 for Nginx on CentOS/RHEL 8

TecMint: Varnish Cache (commonly referred to as Varnish) is an open-source, powerful and fast reverse-proxy HTTP accelerator with modern architecture and flexible configuration language. Being a reverse proxy simply means it is a software that you can deploy in front of your web server (which is the origin server or backend) such as Nginx, to receive clients HTTP requests and forward to the origin server for processing. And it delivers the response from the origin server to clients.