t2informatik.de

.de country-code

Found

TLD

.de (country-code)

ICANN policies apply

no

Checks

• i

  .de is a country-code TLD (ccTLD)

  Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.

  #1
• ✓ TLD delegated and signed #2

  .de is delegated in the root zone and DNSSEC-signed.
• i

  Registration data not available

  No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.

  #3

ns1051.ui-dns.biz, ns1051.ui-dns.com, ns1051.ui-dns.de, ns1051.ui-dns.org

Found

Parent zone

de

Delegation from

a.nic.de (194.0.0.53)

NS at the parent

ns1051.ui-dns.biz, ns1051.ui-dns.com, ns1051.ui-dns.de, ns1051.ui-dns.org

NS in the zone

ns1051.ui-dns.biz, ns1051.ui-dns.com, ns1051.ui-dns.de, ns1051.ui-dns.org

Checks

• ✓ 4 nameservers #6

  Delegated to ns1051.ui-dns.biz, ns1051.ui-dns.com, ns1051.ui-dns.de, ns1051.ui-dns.org.
• ✓ Parent and zone agree #7

  The parent delegation and the zone's NS records list the same nameservers.
• ✓ No glue needed #8

  All nameservers are outside the zone, so no glue records are needed.
• ✓ All names resolve #9

  Every nameserver name has an address and is not an alias.
• i

  One address family in one network

  all IPv6 addresses are in 2607:f1c0:fe::/48, while the other address family is spread over several networks.

  #10
• i

  All nameservers in one AS

  All nameserver addresses are announced by one network operator (AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

  #11
• ✓ Nameserver names under 4 TLDs #12

  Nameserver names use the TLDs .biz, .com, .de, .org.
• ✓ All reachable over IPv6 #13

  Every nameserver has an IPv6 address.

8 of 8 addresses answer authoritatively

Found

Checks

• ✓ All respond #14

  All 8 nameserver addresses answered.
• ✓ All authoritative #15

  Every responding nameserver answers authoritatively for the zone.
• ✓ No recursion #16

  The nameservers do not answer recursive queries for other domains.
• i

  Identifying string disclosed

  These nameservers answer version queries with a string that is not a version number: ns1051.ui-dns.biz: "Served by PowerDNS - https://www.powerdns.com/"; ns1051.ui-dns.com: "Served by PowerDNS - https://www.powerdns.com/"; ns1051.ui-dns.de: "Served by PowerDNS - https://www.powerdns.com/"; ns1051.ui-dns.org: "Served by PowerDNS - https://www.powerdns.com/".

  #17
• ✓ Zone transfers refused #18

  No nameserver allows a zone transfer to the public.
• ✓ TCP supported #19

  All nameservers answer over TCP.
• ✓ EDNS supported #20

  All nameservers support EDNS(0).
• ✓ Public addresses #21

  All nameserver addresses are publicly routable.

11 records at the apex

Found

Read from

185.132.33.51:53

Checks

• ✓ TTLs within range #32

  TTLs: A 1h, MX 1h, NS 2d. The NS TTL at the parent is 1d and in the zone 2d; resolvers may use either.
• ✓ No CNAME at the apex #33

  The zone apex has no CNAME record.
• ✓ No wildcard #34

  Names that don't exist return NXDOMAIN.
• i

  No CAA records

  Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.

  #35