Understand how the cloud-shipped Zscaler SWG entirely gets rid of components and involved fees for effortless scale. Environment that up is immensely complicated, and working it will probably slow down your DNS queries, but if you are a veteran with the Linux command-line, look into Cloudflare's Recommendations for DNS https://socialbuzztoday.com/story2363583/cloudflare-dns-server-can-be-fun-for-anyone