tageblatt.de

ns.sml.de, pns.brv.net

Found

Parent zone

de

Delegation from

a.nic.de (194.0.0.53)

NS at the parent

ns.sml.de, pns.brv.net

NS in the zone

ns.sml.de, pns.brv.net

Checks

• i

  2 nameservers

  Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.sml.de, pns.brv.net.

  #6
• ✓ 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.
• ✓ Nameservers in different networks #10

  The nameservers are spread over 2 IPv4 /24s and 0 IPv6 /48s.
• i

  All nameservers in one AS

  All nameserver addresses are announced by one network operator (AS12923 (WIZARD-AS - Wizard Computersysteme GmbH, DE): 2 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 2 TLDs #12

  Nameserver names use the TLDs .de, .net.
• !

  No IPv6

  None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.

  #13

2 of 2 addresses answer authoritatively

Found

Checks

• ✓ All respond #14

  All 2 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.
• !

  Software version disclosed

  These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns.sml.de: "9.16.50-Debian". Hide or replace the version string.

  #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.

serial 2026092802 · primary pns.brv.net

Found

Primary (MNAME)

pns.brv.net

Contact (RNAME)

service.kanzleipartner.de

Serial

2026092802

Refresh / retry

3600 s / 3600 s

Expire

3600 s

Negative TTL

86400 s

Serial per nameserver

Checks

• ✓ Serial 2026092802 everywhere #22

  All nameservers serve the same version of the zone.
• !

  Unusual SOA timers

  retry 1h should be shorter than refresh 1h; expire 1h is shorter than 7d; secondaries stop answering too soon when the primary is down; expire 1h must be longer than refresh + retry. Current values: refresh 1h, retry 1h, expire 1h, negative TTL 1d.

  #23
• ✓ Primary is a public nameserver #24

  The primary nameserver pns.brv.net is one of the listed nameservers.
• ✓ Contact service@kanzleipartner.de #25

  The SOA RNAME service.kanzleipartner.de means service@kanzleipartner.de.
• ✓ Date-based serial #26

  The serial 2026092802 follows the YYYYMMDDnn convention (2026-09-28).

Not signed

Found

Validated by resolver

no

Checks

• !

  Not signed

  The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

  #27