I was asked to assist in debugging a strange issue involving a BIND resolver: seemingly correlating with an upgrade to Debian 10 a while ago, the chaps were reporting that their 9.11.5 BIND resolvers where responding with impossible TTLs on NOERROR/NODATA responses. My answer: nope – can’t happen.
Quad9, the global, not-for-profit Domain Name System (DNS) security platform, today announced that it has moved its headquarters from California to Zürich, Switzerland supported by Packet Clearing House and SWITCH.
Before the software release, the root server system saw peaks of ~143 billion queries per day. Traffic volumes have since decreased to ~84 billion queries a day. This represents more than a 41 per cent reduction of total query volume.
Wem gehört ein Domainname? Eine kurze Suche in der WHOIS-Datenbank verrät die Antwort. Aber nicht mehr lange. Der vermehrte Missbrauch der hinterlegten Informationen und der gestiegene Wunsch nach Datenschutz haben im Laufe der Jahre für eine immer weitergehende Einschränkung der verfügbaren Angaben gesorgt. Ab dem 1. Januar 2021 sind die Personendaten überhaupt nicht mehr öffentlich zugänglich. SWITCH erteilt nur noch in begründeten Fällen Auskunft.
Since 2000, Netnod has operated i.root-servers.net, one of the Internet’s 13 root name servers and the first to be located outside of the United States. The root name servers, identified by letters A through M, provide the entry points to the Domain Name System (DNS) and are a critical part of the Internet’s infrastructure. In this post, Netnod Senior Systems Specialist Lars-Johan Liman explains the challenges of operating one of these servers.
The Swiss Federal council adopted the lower laws to the telecommunicaiton act today. Amongst it is the Ordinance on Internet Domains that also regulates the ccTLD .ch. SWITCH-CERT welcomes the new ordinance and the smart regulation by the Federal Office of Communications (OFCOM). The Ordinance on Internet Domains will come to power on 1.1.2021 and has some important changes.
Here-in lies the problem. While you can have a wildcard record for branch-deploy.com, if an MX record (or other any record really) exists for a given subdomain and you try to visit your-branch.branch-deploy.com, that A/AAAA/CNAME resolution will not climb the tree to the wildcard.
We recently released a new version of Cloudflare Resolver which adds a piece of information called “Extended DNS Errors” (EDE) along with the response code under certain circumstances. This will be helpful in tracing DNS resolution errors and figuring out what went wrong behind the scenes.
The DNS is a remarkably simple system. You send it queries and you get back answers. Within the system you see exactly the same simplicity: The DNS resolver that receives your query may not know the answer, so it, in turn, will send queries deeper into the system and collects the answers. The query and response process is the same, applied recursively. Simple.
I thought it’d be amusing to provide the public domain data via the DNS, so I did just that. Each airport has a couple of TXT and a LOC record associated with it. The domain name is the 3-letter IATA code.
In late June, Cloudflare's resolver team noticed a spike in DNS requests for the 65479 Resource Record thanks to data exposed through our new Radar service. We began investigating and found these to be a part of Apple’s iOS14 beta release where they were testing out a new SVCB/HTTPS record type.
(or: the good, the bad and the ugly) Due a bug in zone generation, all updates for the EU.ORG zone were stuck from 2020-08-29 02:19 UTC to 2020-09-04 14:40 UTC. Then an incorrect fix was made, resulting in the publication of incorrect DNSSEC signatures for the zone from 2020-09-04 14:40 UTC to 2020-09-04 19:37:00
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.
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