Recently, version 3.0 of Knot DNS – an open-source implementation of an authoritative DNS server – has been released. Despite the version number, the software isn’t changing much. There are slightly more new features than in common feature releases such as 2.9. However, the features added in 3.0 don’t change any behaviour, unless the user turns them on. The migration from 2.9 to 3.0 is therefore seamless.