cnesco.fr

Checked 22 October 2026, 02:21 UTC · via 8.8.8.8
✗Problems found
20 passed 3 warnings 3 failed 5 info

Registration

info

.fr country-code · GIP RENATER · expires 2027-01-22

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
22 January 2014
Last changed
28 February 2026
Expires
22 January 2027
Status
active
Registry nameservers
cnudns.cines.fr, limdns.unilim.fr, limdns2.unilim.fr
RDAP server
https://rdap.nic.fr/

Checks

  • i
    .fr 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
    .fr is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2027-01-22 #3
    The registration is valid until 2027-01-22 (92 days).
  • i
    No transfer lock
    The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.
    #4
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

cnudns.cines.fr, limdns.unilim.fr, limdns2.unilim.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
cnudns.cines.fr, limdns.unilim.fr, limdns2.unilim.fr
NS in the zone
limdns.unilim.fr, limdns2.unilim.fr
NameserverAddressesNetwork (AS)Glue
cnudns.cines.fr (parent only)193.48.169.40 2001:660:6301:301::2:1AS2200 FR-RENATER - Renater, FR AS2200 FR-RENATER - Renater, FR193.48.169.40 2001:660:6301:301::2:1
limdns.unilim.fr164.81.1.4 2001:660:6201:1::4AS1935 FR-RENATER-LIMOUSIN - Renater, EU AS2200 FR-RENATER - Renater, FR164.81.1.4
limdns2.unilim.fr164.81.1.5 2001:660:6201:1::5AS1935 FR-RENATER-LIMOUSIN - Renater, EU AS2200 FR-RENATER - Renater, FR164.81.1.5

Checks

  • ✓ 3 nameservers #6
    Delegated to cnudns.cines.fr, limdns.unilim.fr, limdns2.unilim.fr.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: cnudns.cines.fr. limdns.unilim.fr, limdns2.unilim.fr report NS limdns.unilim.fr limdns2.unilim.fr.
    #7
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: limdns.unilim.fr (glue 164.81.1.4, zone 164.81.1.4, 2001:660:6201:1::4); limdns2.unilim.fr (glue 164.81.1.5, zone 164.81.1.5, 2001:660:6201:1::5). 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 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS1935 (FR-RENATER-LIMOUSIN - Renater, EU): 2 addresses; AS2200 (FR-RENATER - Renater, FR): 4 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

fail

2 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
cnudns.cines.fr 193.48.169.40REFUSED, 26 ms, NOT authoritativenono / yesrefused-
cnudns.cines.fr 2001:660:6301:301::2:1REFUSED, 26 ms, NOT authoritativenono / yesrefused-
limdns.unilim.fr 164.81.1.4NOERROR, 25 ms, authoritativenoyes / yesrefused[Secured]
limdns.unilim.fr 2001:660:6201:1::4no responsenono / no--
limdns2.unilim.fr 164.81.1.5NOERROR, 25 ms, authoritativenoyes / yesrefused[Secured]
limdns2.unilim.fr 2001:660:6201:1::5no responsenono / no--

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: limdns.unilim.fr (2001:660:6201:1::4): read udp [2a01:4f8:1c1c:eebf::1]:37040->[2001:660:6201:1::4]:53: i/o timeout; limdns2.unilim.fr (2001:660:6201:1::5): read udp [2a01:4f8:1c1c:eebf::1]:36873->[2001:660:6201:1::5]:53: i/o timeout.
    #14
  • ✗
    Lame delegation
    These nameservers don't answer authoritatively for the zone, so resolvers ignore them: cnudns.cines.fr (193.48.169.40): REFUSED, authoritative=false; cnudns.cines.fr (2001:660:6301:301::2:1): REFUSED, authoritative=false.
    #15
  • ✓ 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: limdns.unilim.fr: "[Secured]"; limdns2.unilim.fr: "[Secured]".
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: cnudns.cines.fr (193.48.169.40): ; cnudns.cines.fr (2001:660:6301:301::2:1): .
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2025082701 · primary limdns.unilim.fr

Found

Primary (MNAME)
limdns.unilim.fr
Contact (RNAME)
hostmaster.unilim.fr
Serial
2025082701
Refresh / retry
28800 s / 7200 s
Expire
3600000 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
limdns.unilim.fr (164.81.1.4)2025082701
limdns2.unilim.fr (164.81.1.5)2025082701

Checks

  • ✓ Serial 2025082701 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 1000h, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver limdns.unilim.fr is one of the listed nameservers.
  • ✓ Contact hostmaster@unilim.fr #25
    The SOA RNAME hostmaster.unilim.fr means hostmaster@unilim.fr.
  • ✓ Date-based serial #26
    The serial 2025082701 follows the YYYYMMDDnn convention (2025-08-27).

DNSSEC

warn

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

Records

info

6 records at the apex

Found

Read from
164.81.1.4:53
TypeValueTTL
SOAlimdns.unilim.fr. hostmaster.unilim.fr. 2025082701 28800 7200 3600000 1800300
NSlimdns.unilim.fr.300
NSlimdns2.unilim.fr.300
A164.81.1.97300
CAA0 issuewild "letsencrypt.org"300
CAA0 issue "letsencrypt.org"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, NS 5m. The NS TTL at the parent is 1h and in the zone 5m; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org.