institutoptique.fr

Checked 22 October 2026, 03:31 UTC · via 8.8.8.8
✗Problems found
18 passed 6 warnings 1 failed 6 info

Registration

info

.fr country-code · GANDI · expires 2027-12-15

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GANDI
Registered
10 September 2002
Last changed
15 December 2025
Expires
15 December 2027
Status
active
Registry nameservers
dns1.institutoptique.fr, dns1.ioa.institutoptique.fr, dns2.institutoptique.fr, dns2.ioa.institutoptique.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 2027-12-15 #3
    The registration is valid until 2027-12-15 (419 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

dns1.institutoptique.fr, dns1.ioa.institutoptique.fr, dns2.institutoptique.fr, dns2.ioa.institutoptique.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
dns1.institutoptique.fr, dns1.ioa.institutoptique.fr, dns2.institutoptique.fr, dns2.ioa.institutoptique.fr
NS in the zone
dns1.institutoptique.fr, dns2.institutoptique.fr
NameserverAddressesNetwork (AS)Glue
dns1.institutoptique.fr2001:660:302d:4001::b:145AS2200 FR-RENATER - Renater, FR194.199.220.171 2001:660:302d:4001::b:145
dns1.ioa.institutoptique.fr (parent only)194.199.219.171 2001:660:302d:8001::b:145AS2200 FR-RENATER - Renater, FR AS2200 FR-RENATER - Renater, FR194.199.219.171 2001:660:302d:8001::b:145
dns2.institutoptique.fr194.199.220.172 2001:660:302d:4001:0:dc:98:179AS2200 FR-RENATER - Renater, FR AS2200 FR-RENATER - Renater, FR194.199.220.172 2001:660:302d:4001:0:dc:98:179
dns2.ioa.institutoptique.fr (parent only)194.199.219.172 2001:660:302d:8001:0:dc:98:179AS2200 FR-RENATER - Renater, FR AS2200 FR-RENATER - Renater, FR194.199.219.172 2001:660:302d:8001::b:179

Checks

  • ✓ 4 nameservers #6
    Delegated to dns1.institutoptique.fr, dns1.ioa.institutoptique.fr, dns2.institutoptique.fr, dns2.ioa.institutoptique.fr.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: dns1.ioa.institutoptique.fr, dns2.ioa.institutoptique.fr. dns1.ioa.institutoptique.fr, dns2.institutoptique.fr, dns2.ioa.institutoptique.fr report NS dns1.institutoptique.fr dns2.institutoptique.fr.
    #7
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: dns1.institutoptique.fr (glue 194.199.220.171, 2001:660:302d:4001::b:145, zone 2001:660:302d:4001::b:145); dns2.ioa.institutoptique.fr (glue 194.199.219.172, 2001:660:302d:8001::b:179, zone 194.199.219.172, 2001:660:302d:8001:0:dc:98:179). Update the glue at your registrar.
    #8
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:660:302d::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS2200 (FR-RENATER - Renater, FR): 7 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

fail

3 of 7 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.institutoptique.fr 2001:660:302d:4001::b:145no responsenono / no--
dns1.ioa.institutoptique.fr 194.199.219.171NOERROR, 25 ms, authoritativenoyes / yesrefused9.4.2-P2
dns1.ioa.institutoptique.fr 2001:660:302d:8001::b:145no responsenono / no--
dns2.institutoptique.fr 194.199.220.172NOERROR, 17 ms, authoritativenoyes / yesrefused9.4.2-P2
dns2.institutoptique.fr 2001:660:302d:4001:0:dc:98:179no responsenono / no--
dns2.ioa.institutoptique.fr 194.199.219.172NOERROR, 25 ms, authoritativenoyes / yesrefused9.4.2-P2
dns2.ioa.institutoptique.fr 2001:660:302d:8001:0:dc:98:179no responsenono / no--

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: dns1.institutoptique.fr (2001:660:302d:4001::b:145): read udp [2a01:4f8:1c1c:eebf::1]:58461->[2001:660:302d:4001::b:145]:53: i/o timeout; dns1.ioa.institutoptique.fr (2001:660:302d:8001::b:145): read udp [2a01:4f8:1c1c:eebf::1]:39938->[2001:660:302d:8001::b:145]:53: i/o timeout; dns2.institutoptique.fr (2001:660:302d:4001:0:dc:98:179): read udp [2a01:4f8:1c1c:eebf::1]:57937->[2001:660:302d:4001:0:dc:98:179]:53: i/o timeout; dns2.ioa.institutoptique.fr (2001:660:302d:8001:0:dc:98:179): read udp [2a01:4f8:1c1c:eebf::1]:37450->[2001:660:302d:8001:0:dc:98:179]:53: i/o timeout.
    #14
  • ✓ 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: dns1.ioa.institutoptique.fr: "9.4.2-P2"; dns2.institutoptique.fr: "9.4.2-P2"; dns2.ioa.institutoptique.fr: "9.4.2-P2". 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

warn

serial 2026100901 · primary dns1.institutoptique.fr

Found

Primary (MNAME)
dns1.institutoptique.fr
Contact (RNAME)
service.info.institutoptique.fr
Serial
2026100901
Refresh / retry
86400 s / 86400 s
Expire
864000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns1.ioa.institutoptique.fr (194.199.219.171)2026100901
dns2.institutoptique.fr (194.199.220.172)2026100901
dns2.ioa.institutoptique.fr (194.199.219.172)2026100901

Checks

  • ✓ Serial 2026100901 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1d should be shorter than refresh 1d. Current values: refresh 1d, retry 1d, expire 10d, negative TTL 1h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.institutoptique.fr is one of the listed nameservers.
  • ✓ Contact service@info.institutoptique.fr #25
    The SOA RNAME service.info.institutoptique.fr means service@info.institutoptique.fr.
  • ✓ Date-based serial #26
    The serial 2026100901 follows the YYYYMMDDnn convention (2026-10-09).

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

warn

13 records at the apex

Found

Read from
194.199.219.171:53
TypeValueTTL
SOAdns1.institutoptique.fr. service.info.institutoptique.fr. 2026100901 86400 86400 864000 3600864000
NSdns1.institutoptique.fr.864000
NSdns2.institutoptique.fr.864000
A194.199.220.19786400
A194.199.220.19686400
MX50 institutoptique-fr.mail.protection.outlook.com.60
TXT"HARICA-njAxpwGDCwQir3h1sUH"86400
TXT"iGor7sisjrhruIr785fnes"86400
TXT"cc8a6b94220f162639130db051cf595f"86400
TXT"MS=5050FDAE468C54A99E3225F945DA0984044A3FEB"86400
TXT"google-site-verification=KDKA3cmh7LuX_IXA_R0acOGlr210-_oyIEYOBlvMG1w"86400
TXT"v=spf1 include:spf.mailjet.com mx ip4:194.199.220.150 ip4:194.199.220.151 ip4:194.199.220.27 ip4:178.20.69.153 ip6:2001:660:302d:4001::5441:fedc ip6:2001:660:302d:4001:0:7:1445:afd9 include:spf.protection.outlook.com include:_spf.alwaysdata.com -all"86400
TXT"HARICA-ttusDh0s0dOUF5LvNXH"86400

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 10d; resolvers may use either.
    #32
  • ✓ 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