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BuddyNS delegation lab

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Color Indication Color Indication Color Indication
  Zone.   Nameserver serving outdated data.   Nameserver from the BuddyNS backbone.
  Nameserver delegated by zone.   Server was queried and timed out.   Inconsistency between zone and registry.

Geographical distribution of the Authority servers

Location Server

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

Delegation tests for buddyns.com

Test Result Notes
Is Zone OK The indicated domain buddyns.com is a zone: authority and nameserver data is announced for it. These are the authority parameters for zone buddyns.com:
Master
f.ns.buddyns.com.
Administrator
hostmaster@buddyns.com
Version serial
1750061627
Slave refresh
16384
Slave retry
2048
Slave expiry
1048576
Negative cache
2560
Zone delegates BuddyNS OK The authoritative server reached refers BuddyNS as NameServer for buddyns.com. DNS clients are aware they can query BuddyNS for resolving buddyns.com.
Registry delegates BuddyNS OK The last delegating server, reached just before the authoritative one, correctly announces some servers from the BuddyNS backbone. Clients are aware they can reach BuddyNS for resolving buddyns.com even if its primary server(s) fail.
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 buddyns.com correctly serves the same zone version, so client queries will get the same response regardless of the server they reach. Here's the summary:
  • uz5dkwpjfvfwb9rh1qj93mtup0gw65s6j7vqqumch0r9gzlu8qxx39.pro.ns.buddyns.com → #1750061627
  • f.ns.buddyns.com → #1750061627
  • h.ns.buddyns.com → #1750061627
  • uz56xw8h7fw656bpfv84pctjbl9rbzbqrw4rpzdhtvzyltpjdmx0zq.pro.ns.buddyns.com → #1750061627
  • i.ns.buddyns.com → #1750061627
Number of servers OK buddyns.com delegates its DNS to 5 servers. This is a sufficient number to provide DNS continuity. RFC 2182 recommends 3 to 5 servers "when higher reliability is required": BuddyNS recommends 4 or 5.
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 buddyns.com serves recursive queries to the public.
Truncation OK None of the DNS servers listed as authoritative for buddyns.com 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.
IPv6 OK The authority declares one or more servers as reachable via IPv6. IPv6-enabled clients can resolve domains of buddyns.com natively, without falling back to the compatibility IPv4 protocol.

IPv6 score: 100%

Here is the list of IPv6-enabled servers declared by buddyns.com:
  • uz5dkwpjfvfwb9rh1qj93mtup0gw65s6j7vqqumch0r9gzlu8qxx39.pro.ns.buddyns.com → 2604:180:1:92a::3
  • f.ns.buddyns.com → 2a01:4ff:2f0:3661::3
  • h.ns.buddyns.com → 2406:d500:2::de4f:f105
  • uz56xw8h7fw656bpfv84pctjbl9rbzbqrw4rpzdhtvzyltpjdmx0zq.pro.ns.buddyns.com → 2a01:a500:2766::5c3f:d10b
  • i.ns.buddyns.com → 2602:fafd:902:51::a
DNSCurve OK DNSCurve is enabled for this zone. Resolvers like OpenDNS can resolve queries for it with confidentiality and authenticity.

Delegation trace for buddyns.com

Notes

The delegation trace below is one of the possible traversals of the delegation tree. Note that:

  • 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 buddyns.com: