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BuddyNS delegation lab

; zones {color:red,shape:dot} noxor.nl nl . ; servers timing out {color:#777,shape:box} ; inconsistency zones (only in registry or only in zone authority data) {color:orange,shape:box} ; BuddyNS servers {color:green,shape:box} ; all other intermediate delegation server {color:#00BAF2,shape:box} ; authority authority {color:silver,shape:dot,label:Authority} 0 {label:ns2.transip.eu} 1 {label:ns1.transip.net} ; delegations: zone -> delegated servers noxor.nl -> ns2.transip.eu noxor.nl -> ns1.transip.net nl -> sns-pb.isc.org nl -> nl1.dnsnode.net nl -> ns3.dns.nl nl -> ns-nl.nic.fr nl -> ns2.dns.nl nl -> ns1.dns.nl nl -> ns4.dns.nl nl -> ns5.dns.nl . -> b.root-servers.net. . -> l.root-servers.net. . -> k.root-servers.net. . -> i.root-servers.net. . -> h.root-servers.net. . -> f.root-servers.net. . -> d.root-servers.net. . -> c.root-servers.net. . -> a.root-servers.net. . -> m.root-servers.net. . -> j.root-servers.net. . -> g.root-servers.net. . -> e.root-servers.net. ; queries: zone -> queried server i.root-servers.net. -> nl {color:black, weight:4} ns2.dns.nl -> noxor.nl {color:black, weight:4} ns1.transip.net -> authority {color:black, weight:4} ; delegations: authority -> N authority edge authority -> 0 authority -> 1
Color Indication Color Indication Color Indication
  Zone with its announced nameservers.   Nameserver serving outdated data.   Nameserver from the BuddyNS backbone.
  Nameserver serving the zone.   Server was queried and timed out.   Inconsistency between zone and registry.

Geographical distribution of the Authority servers

Location of authority servers

Geographical locations are established via MaxMind's GeoLite technology. Some locations may be inexact.

Delegation tests for noxor.nl

Test Result Notes
Is Zone OK The indicated domain noxor.nl is a zone: authority and nameserver data is announced for it. These are the authority parameters for zone noxor.nl:
Master
ns1.transip.net.
Administrator
hostmaster@transip.nl
Version serial
2017122301
Slave refresh
14400
Slave retry
1800
Slave expiry
2419200
Negative cache
300
Zone/Registry consistent OK The list of nameservers declared by the last delegating server and the authoritative server match. Configuration looks healthy.
Authoritative servers consistent OK Every nameserver authoritative for noxor.nl correctly serves the same zone version, so client queries will get the same response regardless of the server they reach. Here's the summary:
  • ns2.transip.eu: #2017122301
  • ns1.transip.net: #2017122301
Number of servers WARNING noxor.nl delegates its DNS to 2 servers only. This is the bare minimum required in DNS, and exposes to significant reliability issues. RFC 2182 advocates a minimum of 3 nameservers. BuddyNS recommends 4 or 5, and most likely this added reliability will come at no cost. Check out BuddyNS.
Unresponsive nameservers OK All queried nameservers responded; no dead/misconfigured/unavailable server was found in the chosen resolution path.
Recursion OK None of the DNS servers listed as authoritative for noxor.nl serves recursive queries to the public.
Truncation OK None of the DNS servers listed as authoritative for noxor.nl gives a truncated response for NS requests. Clients can successfully perform NS queries over the low-latency UDP protocol, without falling back to much slower TCP.
Sparsity WARNING The DNS servers listed as authoritative for noxor.nl are NOT sufficiently distributed. A range of clients can suffer extensive DNS latencies based on their geographical location, and the stability and availability of DNS can be affected by network problems, power outages, or natural disasters.
Sparsity score
0%
Locations of each authority server are:
  • ns2.transip.eu: Netherlands
  • ns1.transip.net: Netherlands
IPv6 OK The authority declares one or more servers as reachable via IPv6. IPv6-enabled clients can resolve domains of noxor.nl natively, without falling back to the compatibility IPv4 protocol.
IPv6 score
66%
Here is the list of IPv6-enabled servers declared by noxor.nl:
  • ns2.transip.eu: 2a01:7c8:c::53
  • ns1.transip.net: 2a01:7c8:b::53

Delegation trace for noxor.nl

Notes

The following delegation trace is one of the possible traversals of the delegation tree. Nota bene:

  • For zones with correct delegation, the same data is obtained regardless of which resolution path is traversed.
  • BuddyNS excludes its own servers from traversals when foreign servers are available.
  • Refresh this page to test with a different traversal path.

Here's the steps BuddyNS took to collect the DNS delegation chain for noxor.nl:

  1. BuddyNS inquired server i.root-servers.net., which delegates zone nl to:
    • sns-pb.isc.org
    • nl1.dnsnode.net
    • ns3.dns.nl
    • ns-nl.nic.fr
    • ns2.dns.nl
    • ns1.dns.nl
    • ns4.dns.nl
    • ns5.dns.nl
  2. BuddyNS inquired server ns2.dns.nl, which delegates zone noxor.nl to:
    • ns2.transip.eu
    • ns1.transip.net
  3. ns1.transip.net is authoritative for zone noxor.nl! It provides this authority list:
    • ns2.transip.eu
    • ns1.transip.net