telecom-paristech.fr

Checked 22 October 2026, 05:24 UTC · via 8.8.8.8
✗Problems found
24 passed 2 warnings 1 failed 4 info

Registration

info

.fr country-code · GANDI · expires 2027-12-07

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GANDI
Registered
7 December 2006
Last changed
8 June 2026
Expires
7 December 2027
Status
active
Registry nameservers
ns-auth1.enst.fr, ns-auth2.enst.fr, ns4.int-evry.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 2027-12-07 #3
    The registration is valid until 2027-12-07 (411 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

info

ns-auth1.enst.fr, ns-auth2.enst.fr, ns4.int-evry.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
ns-auth1.enst.fr, ns-auth2.enst.fr, ns4.int-evry.fr
NS in the zone
ns-auth1.enst.fr, ns-auth2.enst.fr, ns4.int-evry.fr
NameserverAddressesNetwork (AS)Glue
ns-auth1.enst.fr137.194.2.156 2a04:8ec0:0:2::156AS1712 FR-RENATER-ENST - Renater, FR AS1712 FR-RENATER-ENST - Renater, FR137.194.2.156 2a04:8ec0:0:2::156
ns-auth2.enst.fr137.194.2.157 2a04:8ec0:0:2::157AS1712 FR-RENATER-ENST - Renater, FR AS1712 FR-RENATER-ENST - Renater, FR137.194.2.157 2a04:8ec0:0:2::157
ns4.int-evry.fr157.159.11.14 2001:660:3203:110::53:14AS2094 FR-TELECOM-MANAGEMENT-SUDPARIS - Renater, EU AS2200 FR-RENATER - Renater, FR157.159.11.14 2001:660:3203:110::53:14

Checks

  • ✓ 3 nameservers #6
    Delegated to ns-auth1.enst.fr, ns-auth2.enst.fr, ns4.int-evry.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 2 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS1712 (FR-RENATER-ENST - Renater, FR): 4 addresses; AS2094 (FR-TELECOM-MANAGEMENT-SUDPARIS - Renater, EU): 1 address; AS2200 (FR-RENATER - Renater, FR): 1 address.
  • 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

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-auth1.enst.fr 137.194.2.156NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns-auth1.enst.fr 2a04:8ec0:0:2::156NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns-auth2.enst.fr 137.194.2.157NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns-auth2.enst.fr 2a04:8ec0:0:2::157NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns4.int-evry.fr 157.159.11.14NOERROR, 14 ms, authoritativeOPENyes / yesrefused9.16.23-RH
ns4.int-evry.fr 2001:660:3203:110::53:14NOERROR, 14 ms, authoritativenoyes / yesrefused9.16.23-RH

Checks

  • ✓ All respond #14
    All 6 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✗
    Open recursion
    These nameservers resolve names for anyone, which makes them usable for DNS amplification attacks and cache poisoning: ns4.int-evry.fr (157.159.11.14). Disable recursion on authoritative servers.
    #16
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns4.int-evry.fr: "9.16.23-RH". 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 2026102100 · primary ns-auth1.enst.fr

Found

Primary (MNAME)
ns-auth1.enst.fr
Contact (RNAME)
hostmaster.enst.fr
Serial
2026102100
Refresh / retry
21600 s / 3600 s
Expire
2419200 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-auth1.enst.fr (137.194.2.156)2026102100
ns-auth1.enst.fr (2a04:8ec0:0:2::156)2026102100
ns-auth2.enst.fr (137.194.2.157)2026102100
ns-auth2.enst.fr (2a04:8ec0:0:2::157)2026102100
ns4.int-evry.fr (157.159.11.14)2026102100
ns4.int-evry.fr (2001:660:3203:110::53:14)2026102100

Checks

  • ✓ Serial 2026102100 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 1h, expire 28d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-auth1.enst.fr is one of the listed nameservers.
  • ✓ Contact hostmaster@enst.fr #25
    The SOA RNAME hostmaster.enst.fr means hostmaster@enst.fr.
  • ✓ Date-based serial #26
    The serial 2026102100 follows the YYYYMMDDnn convention (2026-10-21).

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

12 records at the apex

Found

Read from
137.194.2.156:53
TypeValueTTL
SOAns-auth1.enst.fr. hostmaster.enst.fr. 2026102100 21600 3600 2419200 8640086400
NSns4.int-evry.fr.86400
NSns-auth1.enst.fr.86400
NSns-auth2.enst.fr.86400
A137.194.22.227600
AAAA2a04:8ec0:0:a::89c2:16e386400
MX10 mx1.enst.fr.86400
MX20 mx2.enst.fr.86400
TXT"MS=ms41296044"86400
TXT"v=spf1 redirect=enst.fr"86400
TXT"MS=C7B741F196C1884AB769C72410758B4601936C9A"86400
TXT"cisco-ci-domain-verification=e76a4a46ae587c58831ae36397e0b16a9e67707ce8f565caa14f881aa347674"86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, AAAA 1d, MX 1d, NS 1d. The NS TTL at the parent is 1h and in the zone 1d; 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.
  • 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