michaelkors.fr

a1-111.akam.net, a14-66.akam.net, a18-67.akam.net, a3-67.akam.net, a5-67.akam.net, a8-66.akam.net

Found

Parent zone

fr

Delegation from

d.nic.fr (194.0.9.1)

NS at the parent

a1-111.akam.net, a14-66.akam.net, a18-67.akam.net, a3-67.akam.net, a5-67.akam.net, a8-66.akam.net

NS in the zone

a1-111.akam.net, a14-66.akam.net, a18-67.akam.net, a3-67.akam.net, a5-67.akam.net, a8-66.akam.net, ns1.paetec.net, ns2.paetec.net, ns3.paetec.net

Checks

• ✓ 6 nameservers #6

  Delegated to a1-111.akam.net, a14-66.akam.net, a18-67.akam.net, a3-67.akam.net, a5-67.akam.net, a8-66.akam.net.
• !

  NS sets differ

  The nameservers at the parent and in the zone should be the same. Only in the zone: ns1.paetec.net, ns2.paetec.net, ns3.paetec.net. a1-111.akam.net, a14-66.akam.net, a18-67.akam.net, a3-67.akam.net, a5-67.akam.net, a8-66.akam.net report NS a1-111.akam.net a14-66.akam.net a18-67.akam.net a3-67.akam.net a5-67.akam.net a8-66.akam.net ns1.paetec.net ns2.paetec.net ns3.paetec.net. ns1.paetec.net, ns2.paetec.net, ns3.paetec.net report NS cns01.windstream.net cns02.windstream.net cns03.windstream.net cns04.windstream.net.

  #7
• ✓ 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 9 IPv4 /24s and 6 IPv6 /48s.
• ✓ 3 autonomous systems #11

  The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 1 address; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 11 addresses; AS7029 (WINDSTREAM - Windstream Communications LLC, US): 3 addresses.
• i

  All nameserver names under .net

  All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.

  #12
• i

  Partly IPv6

  These nameservers have no IPv6 address: ns1.paetec.net, ns2.paetec.net, ns3.paetec.net.

  #13

15 of 15 addresses answer authoritatively

Found

Checks

• ✓ All respond #14

  All 15 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: a1-111.akam.net: "41824.8"; a1-111.akam.net: "41824.9"; a14-66.akam.net: "48878.29"; a14-66.akam.net: "48878.26"; a18-67.akam.net: "48878.30"; a3-67.akam.net: "41824.5"; a3-67.akam.net: "41824.10"; a5-67.akam.net: "41824.4"; a5-67.akam.net: "41824.8"; a8-66.akam.net: "48878.30"; a8-66.akam.net: "48878.27". 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 125 · primary dns-master.paetec.net

Found

Primary (MNAME)

dns-master.paetec.net

Contact (RNAME)

dnsadmin.paetec.net

Serial

125

Refresh / retry

28800 s / 14400 s

Expire

604800 s

Negative TTL

86400 s

Serial per nameserver

Checks

• !

  Serials differ

  The nameservers serve different versions of the zone: 125 on a1-111.akam.net (193.108.91.111), a1-111.akam.net (2600:1401:2::6f), a14-66.akam.net (184.26.161.66), a14-66.akam.net (2600:1480:1800::42), a18-67.akam.net (95.101.36.67), a18-67.akam.net (2600:1480:4800::43), a3-67.akam.net (96.7.49.67), a3-67.akam.net (2600:1408:1c::43), a5-67.akam.net (95.100.168.67), a5-67.akam.net (2600:1480:b000::43), a8-66.akam.net (2.16.40.66), a8-66.akam.net (2600:1403:a::42); 2020111600 on ns1.paetec.net (66.155.216.121), ns2.paetec.net (207.59.153.241), ns3.paetec.net (66.251.35.129). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.

  #22
• ✓ Timers within recommendations #23

  SOA refresh 8h, retry 4h, expire 7d, negative TTL 1d.
• i

  Hidden master

  The primary nameserver dns-master.paetec.net is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.

  #24
• ✓ Contact dnsadmin@paetec.net #25

  The SOA RNAME dnsadmin.paetec.net means dnsadmin@paetec.net.
• ✓ Counter serial #26

  The serial 125 is a plain counter.

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

16 records at the apex

Found

Read from

193.108.91.111:53

Checks

• !

  Very low TTLs

  These records have a TTL below 5m, causing extra queries and slower lookups: A (20s). Low TTLs are useful just before a planned change.

  #32
• ✓ 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