Upgrade of the .CZ DNS or Behind the Scenes of Preparation and Implementation – Part Two

At the beginning of 2017, we started working on a project of augmenting infrastructure of authoritative DNS servers that keep the .CZ domain running. Our main motivation was to increase the resiliency of the DNS infrastructure against DDoS attacks – the risk that is constantly growing. The basic building unit of the new DNS infrastructure is the so-called “DNS stack”.