ac-grenoble.fr

Checked 22 October 2026, 01:22 UTC · via 8.8.8.8
✗Problems found
22 passed 3 warnings 1 failed 5 info

Registration

info

.fr country-code · GIP RENATER · expires 2027-04-25

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
25 April 1996
Last changed
31 May 2026
Expires
25 April 2027
Status
active
Registry nameservers
ns0.ac-grenoble.fr, ns1.ac-grenoble.fr, pass-ren.ac-caen.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 2027-04-25 #3
    The registration is valid until 2027-04-25 (185 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

ns0.ac-grenoble.fr, ns1.ac-grenoble.fr, pass-ren.ac-caen.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
ns0.ac-grenoble.fr, ns1.ac-grenoble.fr, pass-ren.ac-caen.fr
NS in the zone
ns0.ac-grenoble.fr, ns1.ac-grenoble.fr, pass-ren.ac-caen.fr
NameserverAddressesNetwork (AS)Glue
ns0.ac-grenoble.fr193.54.149.20AS2200 FR-RENATER - Renater, FR193.54.149.20
ns1.ac-grenoble.fr193.54.149.11AS2200 FR-RENATER - Renater, FR193.54.149.11
pass-ren.ac-caen.fr193.50.120.71AS2200 FR-RENATER - Renater, FR-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns0.ac-grenoble.fr, ns1.ac-grenoble.fr, pass-ren.ac-caen.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: ns0.ac-grenoble.fr, ns1.ac-grenoble.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

fail

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns0.ac-grenoble.fr 193.54.149.20NOERROR, 32 ms, authoritativenono / yesrefused9.20.15-1~deb13u1-Debian
ns1.ac-grenoble.fr 193.54.149.11NOERROR, 29 ms, authoritativenoyes / yesrefused9.20.15-1~deb13u1-Debian
pass-ren.ac-caen.fr 193.50.120.71NOERROR, 15 ms, authoritativenoyes / yesrefused9.18.33

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: ns0.ac-grenoble.fr: "9.20.15-1~deb13u1-Debian"; ns1.ac-grenoble.fr: "9.20.15-1~deb13u1-Debian"; pass-ren.ac-caen.fr: "9.18.33". Hide or replace the version string.
    #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: ns0.ac-grenoble.fr (193.54.149.20): read tcp 46.225.38.91:52568->193.54.149.20:53: i/o timeout.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026102001 · primary ns0.ac-grenoble.fr

Found

Primary (MNAME)
ns0.ac-grenoble.fr
Contact (RNAME)
systeme.ac-grenoble.fr
Serial
2026102001
Refresh / retry
3600 s / 1800 s
Expire
3024000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns0.ac-grenoble.fr (193.54.149.20)2026102001
ns1.ac-grenoble.fr (193.54.149.11)2026102001
pass-ren.ac-caen.fr (193.50.120.71)2026102001

Checks

  • ✓ Serial 2026102001 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 30m, expire 35d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns0.ac-grenoble.fr is one of the listed nameservers.
  • ✓ Contact systeme@ac-grenoble.fr #25
    The SOA RNAME systeme.ac-grenoble.fr means systeme@ac-grenoble.fr.
  • ✓ Date-based serial #26
    The serial 2026102001 follows the YYYYMMDDnn convention (2026-10-20).

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
193.54.149.20:53
TypeValueTTL
SOAns0.ac-grenoble.fr. systeme.ac-grenoble.fr. 2026102001 3600 1800 3024000 360086400
NSns1.ac-grenoble.fr.86400
NSpass-ren.ac-caen.fr.86400
NSns0.ac-grenoble.fr.86400
A193.54.149.86600
MX10 msg-b85.education.gouv.fr.600
MX10 msg-a85.education.gouv.fr.600
TXT"HARICA-EWiQSY3gdSbMZp3TkV5"3600
TXT"v=spf1 mx ip4:195.221.235.23/32 ip4:195.221.235.27/32 ip4:195.221.235.25/32 ip4:195.221.235.26/32 ip4:195.221.235.182/32 ip4:195.221.235.183/32 ip4:195.221.235.16/32 ip4:195.221.235.17/32 ip4:193.51.147.21/28 ip4:193.51.147.200/29" " ip4:193.54.151.80/29 ip4:194.254.206.80/29 -all"3600
TXT"yahoo-verification-key=FdDwL/l2IP4YsxBSe4AzMZ4i6eiWJrK/nPsZpVniU+A="3600
TXT"MS=77227086202A7613D822997925A9DCB67CE82A2A"3600
TXT"google-site-verification=GyHs2suhh8GIdezxO9PTlrAE55zza20c636X2N9Hl20"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, 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