edgedns VS nench

For the biggest pioneers, there is also a variant to build your own GeoDNS service with your own name servers. But for this to make sense and real value, anycast IP addresses would be needed. Also a number of other reliable servers around the world with DDoS protection and then understand, select and adapt eg EdgeDNS or Czech Knot DNS (which also uses Cloudflare). However, commercial GeoDNS services are relatively cheap and reliable, so we can’t imagine an ROI that would make sense with our own small, non-commercial DNS solution.

Virtual vs. physical server — this is a rather controversial topic and it is not appropriate to generalize it. If the economy allows, choose physical servers for critical servers, even if only those from the basic menu. Redundant disks are a must, ideally with redundant power supply. With a physical server, you usually get a 1 Gbps uplink and a direct physical connection directly to the ToR switch. There is a much lower chance that you will struggle with sharing CPU and IO or connectivity on a physical hypervisor running hundreds, or dozens of virtual servers at best. If you’re lucky, they have a shared “tube” of * × 10 Gbit, or worse, they have 1 Gbit. With authenticated providers you don’t even have to worry about virtual servers, just watch the aggregation and performance (eg benchmark nench). Over time, the collected metrics will also tell you a lot, especially for redundant PoPs that will handle ± the same traffic (DNS round-robin). As a result, we have very quickly detected very aggressive CPU throttling or volatile IO performance at some providers.