On September 24, 2019, a release entry for the KnotDNS 2.8.4 DNS server appeared on the developer's website. The project is developed by the Czech domain registrar CZ.NIC. KnotDNS is a high-performance DNS server that supports all DNS capabilities. It is written in C and distributed under a license. GPLv3.
To ensure high performance in handling requests, a multithreaded, mostly non-blocking implementation is employed, which is well-scalable on SMP systems.
Features of the server include:
- on-the-fly zone addition and deletion;
- zone transfers between servers;
- DDNS (dynamic updates);
- NSID (RFC 5001);
- EDNS0 and DNSSEC extensions (including NSEC3);
- response rate limiting (RRL)
New features in version 2.8.4 include:
- automatic loading of DS (Delegation of Signing) records into the parent DNS zone using DDNS;
- in cases where there are network connection issues, incoming IXFR requests are no longer converted to AXFR;
- improved verification of missing GR (Glue Record) entries with DNS server addresses defined on the registrar's side.
Source: linux.org.ru
