Utilizing your personal DNS servers
Utilizing your personal DNS servers
It won't boost your internet speed—just how quickly DNS queries are resolved. Transfer speeds and latency stay unchanged. You should assess its effect on your servers: are there hostnames or DNS entries the local server can handle that an external one can't? For example, if two servers need to communicate internally, will they be able to resolve those internal IPs with 1.1.1.1 most of the time? The answer depends on your setup.
Sure, I get it. I was focusing too much on the title. Networking is tricky, but if everyone’s in the same rack, communication should work through the switch.
Your computer's DNS service functions like a complete DNS server, which is hard to notice unless you're experiencing slow connections across the globe. Each time you resolve a domain name, your device stores the IP address in its cache. Over time it removes old entries, but until then it checks locally for the address.
They may comply if instructed. When you instruct your servers to employ Cloudflare's DNS, they will avoid using your local DNS. Any settings dependent on a local hostname would fail because it cannot be resolved. You’d need to review everything and update it to IP addresses.