ens-rennes.fr

Checked 22 October 2026, 02:45 UTC · via 8.8.8.8
!Passed with warnings
27 passed 2 warnings 0 failed 5 info

Registration

info

.fr country-code · GIP RENATER · expires 2027-02-13

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
9 December 2009
Last changed
31 March 2026
Expires
13 February 2027
Status
active
Registry nameservers
ns1.ens-rennes.fr, ns2.ens-rennes.fr, ns3.ens-rennes.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 2027-02-13 #3
    The registration is valid until 2027-02-13 (114 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

ns1.ens-rennes.fr, ns2.ens-rennes.fr, ns3.ens-rennes.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
ns1.ens-rennes.fr, ns2.ens-rennes.fr, ns3.ens-rennes.fr
NS in the zone
ns1.ens-rennes.fr, ns2.ens-rennes.fr, ns3.ens-rennes.fr
NameserverAddressesNetwork (AS)Glue
ns1.ens-rennes.fr194.254.218.17AS2200 FR-RENATER - Renater, FR194.254.218.17
ns2.ens-rennes.fr193.52.92.84AS2200 FR-RENATER - Renater, FR193.52.92.84
ns3.ens-rennes.fr193.52.92.85AS2200 FR-RENATER - Renater, FR193.52.92.85

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.ens-rennes.fr, ns2.ens-rennes.fr, ns3.ens-rennes.fr.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns1.ens-rennes.fr, ns2.ens-rennes.fr, ns3.ens-rennes.fr.
  • ✓ 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 (AS2200 (FR-RENATER - Renater, FR): 3 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.ens-rennes.fr 194.254.218.17NOERROR, 22 ms, authoritativenoyes / yesrefused-
ns2.ens-rennes.fr 193.52.92.84NOERROR, 21 ms, authoritativenoyes / yesrefused-
ns3.ens-rennes.fr 193.52.92.85NOERROR, 20 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 3 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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.

SOA

pass

serial 2026280506 · primary ns2.ens-rennes.fr

Found

Primary (MNAME)
ns2.ens-rennes.fr
Contact (RNAME)
dns-postmaster.ens-rennes.fr
Serial
2026280506
Refresh / retry
21600 s / 3600 s
Expire
3600000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.ens-rennes.fr (194.254.218.17)2026280506
ns2.ens-rennes.fr (193.52.92.84)2026280506
ns3.ens-rennes.fr (193.52.92.85)2026280506

Checks

  • ✓ Serial 2026280506 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 1h, expire 1000h, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns2.ens-rennes.fr is one of the listed nameservers.
  • ✓ Contact dns-postmaster@ens-rennes.fr #25
    The SOA RNAME dns-postmaster.ens-rennes.fr means dns-postmaster@ens-rennes.fr.
  • ✓ Timestamp serial #26
    The serial 2026280506 is a Unix timestamp (2034-03-18 07:41 UTC).

DNSSEC

warn

Signed, but no DS at parent

Found

Validated by resolver
no
Denial of existence
NSEC
Signatures valid until
5 November 2026

DNSKEY in the zone

Key tagRoleAlgorithm
47533ZSK (256)ECDSAP384SHA384 (14)
46658KSK (257)ECDSAP384SHA384 (14)

Checks

  • !
    Signed but not delegated securely
    The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.
    #27
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP384SHA384 (14).
  • ✓ Signatures valid until 2026-11-05 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-05 14:16 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

pass

17 records at the apex

Found

Read from
194.254.218.17:53
TypeValueTTL
SOAns2.ens-rennes.fr. dns-postmaster.ens-rennes.fr. 2026280506 21600 3600 3600000 864001783
NSns1.ens-rennes.fr.1783
NSns2.ens-rennes.fr.1783
NSns3.ens-rennes.fr.1783
MX10 mx1.relay.renater.fr.1783
MX10 mx2.relay.renater.fr.1783
TXT"MS=ms46187875"1783
TXT"HARICA-Zu2UAYDU0W6aZl2ySKq"1783
TXT"HARICA-pKsiU7pojtFwO6wgtGn"1783
TXT"apple-domain-verification=glV48zfAW54MycYV"1783
TXT"MS=7D41E074AA2AEE118123D939AA7BF2CB66F68072"1783
TXT"druide-validation-domaine=4bc26558371ab4e9beca9c2ba85f1cec"1783
TXT"v=spf1 mx a ip4:193.52.92.25 include:spf.partage.renater.fr include:spf.relay.renater.fr ip4:80.247.238.89 -all"1783
CAA0 issue "harica.gr"1783
CAA0 issue "letsencrypt.org"1783
CAA0 issuewild "harica.gr"1783
CAA0 issuewild "letsencrypt.org"1783

Checks

  • ✓ TTLs within range #32
    TTLs: MX 29m43s, NS 29m43s. The NS TTL at the parent is 1h and in the zone 29m43s; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: harica.gr, letsencrypt.org.