ens-cachan.fr

Checked 22 October 2026, 02:45 UTC · via 8.8.8.8
!Passed with warnings
24 passed 3 warnings 0 failed 4 info

Registration

info

.fr country-code · GIP RENATER · expires 2027-09-29

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
29 September 1996
Last changed
29 September 2026
Expires
29 September 2027
Status
active, auto renew period
Registry nameservers
ariane.ens-paris-saclay.fr, ariane2.ens-paris-saclay.fr, arianex.ens-paris-saclay.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 2027-09-29 #3
    The registration is valid until 2027-09-29 (342 days).
  • i
    No transfer lock
    The domain has no transfer lock (status: active, auto renew period). 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

ariane.ens-paris-saclay.fr, ariane2.ens-paris-saclay.fr, arianex.ens-paris-saclay.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
ariane.ens-paris-saclay.fr, ariane2.ens-paris-saclay.fr, arianex.ens-paris-saclay.fr
NS in the zone
ariane.ens-paris-saclay.fr, ariane2.ens-paris-saclay.fr, arianex.ens-paris-saclay.fr
NameserverAddressesNetwork (AS)Glue
ariane.ens-paris-saclay.fr138.231.176.4AS2269 FR-U-PARISSUD-ORSAY - Renater, EU138.231.176.4
ariane2.ens-paris-saclay.fr138.231.176.54AS2269 FR-U-PARISSUD-ORSAY - Renater, EU138.231.176.54
arianex.ens-paris-saclay.fr157.136.240.194AS2200 FR-RENATER - Renater, FR157.136.240.194

Checks

  • ✓ 3 nameservers #6
    Delegated to ariane.ens-paris-saclay.fr, ariane2.ens-paris-saclay.fr, arianex.ens-paris-saclay.fr.
  • ✓ 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.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS2200 (FR-RENATER - Renater, FR): 1 address; AS2269 (FR-U-PARISSUD-ORSAY - Renater, EU): 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ariane.ens-paris-saclay.fr 138.231.176.4NOERROR, 16 ms, authoritativenoyes / yesrefused9.18.44-1~deb12u1-Debian
ariane2.ens-paris-saclay.fr 138.231.176.54NOERROR, 16 ms, authoritativenoyes / yesrefused9.18.44-1~deb12u1-Debian
arianex.ens-paris-saclay.fr 157.136.240.194NOERROR, 15 ms, authoritativenoyes / yesrefused9.18.44-1~deb12u1-Debian

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ariane.ens-paris-saclay.fr: "9.18.44-1~deb12u1-Debian"; ariane2.ens-paris-saclay.fr: "9.18.44-1~deb12u1-Debian"; arianex.ens-paris-saclay.fr: "9.18.44-1~deb12u1-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.

SOA

pass

serial 2026100700 · primary ariane.ens-paris-saclay.fr

Found

Primary (MNAME)
ariane.ens-paris-saclay.fr
Contact (RNAME)
reseau.ens-paris-saclay.fr
Serial
2026100700
Refresh / retry
21600 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ariane.ens-paris-saclay.fr (138.231.176.4)2026100700
ariane2.ens-paris-saclay.fr (138.231.176.54)2026100700
arianex.ens-paris-saclay.fr (157.136.240.194)2026100700

Checks

  • ✓ Serial 2026100700 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 1h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ariane.ens-paris-saclay.fr is one of the listed nameservers.
  • ✓ Contact reseau@ens-paris-saclay.fr #25
    The SOA RNAME reseau.ens-paris-saclay.fr means reseau@ens-paris-saclay.fr.
  • ✓ Date-based serial #26
    The serial 2026100700 follows the YYYYMMDDnn convention (2026-10-07).

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

9 records at the apex

Found

Read from
138.231.176.4:53
TypeValueTTL
SOAariane.ens-paris-saclay.fr. reseau.ens-paris-saclay.fr. 2026100700 21600 3600 604800 36003600
NSariane2.ens-paris-saclay.fr.3600
NSarianex.ens-paris-saclay.fr.3600
NSariane.ens-paris-saclay.fr.3600
A138.231.176.513600
MX50 mx1.relay.renater.fr.3600
MX50 mx2.relay.renater.fr.3600
TXT"v=spf1 ip4:138.231.176.4 ip4:138.231.176.54 ip4:138.231.176.5 ip4:138.231.176.6 ip4:138.231.176.3 ip4:138.231.176.53 include:spf.relay.renater.fr ~all"3600
TXT"apple-domain-verification=ZWftECK2Ojn5HmSn"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h.
  • ✓ 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