marignane.fr

ns1.celeste.fr, ns2.celeste.fr

Found

Parent zone

fr

Delegation from

d.nic.fr (194.0.9.1)

NS at the parent

ns1.celeste.fr, ns2.celeste.fr

NS in the zone

ns4.wixdns.net, ns5.wixdns.net

Checks

• i

  2 nameservers

  Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.celeste.fr, ns2.celeste.fr.

  #6
• !

  NS sets differ

  The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.celeste.fr, ns2.celeste.fr; only in the zone: ns4.wixdns.net, ns5.wixdns.net. ns1.celeste.fr, ns2.celeste.fr, ns4.wixdns.net, ns5.wixdns.net report NS ns4.wixdns.net ns5.wixdns.net.

  #7
• !

  Glue differs from the zone

  The addresses at the parent (glue) differ from the addresses in the zone: ns1.celeste.fr (glue 83.142.144.247, zone 83.142.144.247, 2001:ab8:100:2::). Update the glue at your registrar.

  #8
• ✓ 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 4 IPv4 /24s and 1 IPv6 /48.
• ✓ 3 autonomous systems #11

  The nameservers are spread over: AS12876 (AS12876 - Scaleway SAS, FR): 1 address; AS15169 (GOOGLE - Google LLC, US): 2 addresses; AS34177 (CELESTE-AS - Celeste SAS, FR): 2 addresses.
• i

  All nameserver names under .fr

  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: ns2.celeste.fr, ns4.wixdns.net, ns5.wixdns.net.

  #13

5 of 5 addresses answer authoritatively

Found

Checks

• ✓ All respond #14

  All 5 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: ns1.celeste.fr: "9.11.5-P4-5.1+deb10u2-Debian"; ns2.celeste.fr: "9.11.5-P4-5.1+deb10u2-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 2023120401 · primary ns1.celeste.fr.marignane.fr

Found

Primary (MNAME)

ns1.celeste.fr.marignane.fr

Contact (RNAME)

support.celeste.fr

Serial

2023120401

Refresh / retry

3600 s / 900 s

Expire

604800 s

Negative TTL

3600 s

Serial per nameserver

Checks

• !

  Serials differ

  The nameservers serve different versions of the zone: 2023070512 on ns4.wixdns.net (216.239.36.101), ns5.wixdns.net (216.239.38.101); 2023120401 on ns1.celeste.fr (83.142.144.247), ns1.celeste.fr (2001:ab8:100:2::), ns2.celeste.fr (163.172.72.108). 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 1h, retry 15m, expire 7d, negative TTL 1h.
• i

  Hidden master (not resolvable)

  The primary nameserver ns1.celeste.fr.marignane.fr is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.

  #24
• ✓ Contact support@celeste.fr #25

  The SOA RNAME support.celeste.fr means support@celeste.fr.
• ✓ Date-based serial #26

  The serial 2023120401 follows the YYYYMMDDnn convention (2023-12-04).

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