univ-irem.fr

Checked 22 October 2026, 05:35 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 5 info

Registration

info

.fr country-code · GIP RENATER · expires 2027-05-18

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
18 May 2000
Last changed
30 June 2026
Expires
18 May 2027
Status
active
Registry nameservers
dns1.math.cnrs.fr, dns2.math.cnrs.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 2027-05-18 #3
    The registration is valid until 2027-05-18 (208 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.math.cnrs.fr, dns2.math.cnrs.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
dns1.math.cnrs.fr, dns2.math.cnrs.fr
NS in the zone
dns1.math.cnrs.fr, dns2.math.cnrs.fr
NameserverAddressesNetwork (AS)Glue
dns1.math.cnrs.fr157.136.141.195AS2200 FR-RENATER - Renater, FR-
dns2.math.cnrs.fr129.88.178.163AS1942 FR-TIGRE - Renater, EU-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.math.cnrs.fr, dns2.math.cnrs.fr.
    #6
  • ✓ 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: AS1942 (FR-TIGRE - 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.math.cnrs.fr 157.136.141.195NOERROR, 18 ms, authoritativenoyes / yesrefused9.20.23
dns2.math.cnrs.fr 129.88.178.163NOERROR, 22 ms, authoritativenoyes / yesrefused9.20.23

Checks

  • ✓ All respond #14
    All 2 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: dns1.math.cnrs.fr: "9.20.23"; dns2.math.cnrs.fr: "9.20.23". 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 2024040404 · primary dns1.math.cnrs.fr

Found

Primary (MNAME)
dns1.math.cnrs.fr
Contact (RNAME)
root.math.cnrs.fr
Serial
2024040404
Refresh / retry
21600 s / 3600 s
Expire
1209600 s
Negative TTL
43200 s

Serial per nameserver

NameserverSerial
dns1.math.cnrs.fr (157.136.141.195)2024040404
dns2.math.cnrs.fr (129.88.178.163)2024040404

Checks

  • ✓ Serial 2024040404 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 1h, expire 14d, negative TTL 12h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.math.cnrs.fr is one of the listed nameservers.
  • ✓ Contact root@math.cnrs.fr #25
    The SOA RNAME root.math.cnrs.fr means root@math.cnrs.fr.
  • ✓ Date-based serial #26
    The serial 2024040404 follows the YYYYMMDDnn convention (2024-04-04).

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

6 records at the apex

Found

Read from
157.136.141.195:53
TypeValueTTL
SOAdns1.math.cnrs.fr. root.math.cnrs.fr. 2024040404 21600 3600 1209600 4320043200
NSdns2.math.cnrs.fr.43200
NSdns1.math.cnrs.fr.43200
A157.136.141.16943200
MX5 smail.math.u-bordeaux.fr.43200
TXT"v=spf1 a mx ip4:157.136.141.177 ip4:147.210.110.140 ip4:157.136.141.169 ip4:139.124.34.0/24 -all"43200

Checks

  • ✓ TTLs within range #32
    TTLs: A 12h, MX 12h, NS 12h. The NS TTL at the parent is 1h and in the zone 12h; 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