- DNS generally uses the connectionless User Datagram Protocol (UDP) as its transport.
- Many autonomous systems allow source-spoofed packets to enter their network.
- There is no shortage of Open Resolvers on the Internet.
Please be advised that DNS-OARC will be relocating its equipment and services to a new facility during next week starting this Saturday, May 14th through Wednesday the 18th. There will be multiple sporadic outages during this time affecting ALL services and ALL systems as a result.
ICANN's Root Server System Advisory Committee has recently defined two standards, including RSSAC 002 , designed to obtain a baseline of the metrics for the Root Zone, specifically so that root operators can detect and mitigate any abnormalities in the performance of the DNS Root Server System as it continues to grow and develop.
2023-06-01: This service has been deprecated in favor of Check My DNS.
Recent increases in DNSSEC deployment are exposing problems with DNS resolvers that cannot receive large responses. The maximim reply size between a DNS server and resolver may be limited by a number of factors:
- George Michaelson (APNIC)
- Ondrej Filip (CZ.NIC)
- John Crain (ICANN)
- Don Blumenthal (PIR)
- Existing Board member Antoin Verschuren's (SIDN) two-year term has ended. Antoin will not be standing for re-election.
- Existing Board member Ondrej Filip's (CZ.NIC) two-year term has ended. Ondrej will be standing for re-election.
- Existing Board member John Crain's two-year term has ended.
There are a number of DNS Looking Glass sites around the Internet that will allow anyone to send a DNS query from that location. Looking Glasses are of particular use in the case of troubleshooting a problem with a DNS zone that is served from an anycasted service. In the event of a problem with the service, the view of a zone can be very different from distant places on the Internet. Here is a list of some of the known looking glass sites around the Internet: