univ-paris5.fr

Checked 22 October 2026, 05:36 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 warnings 0 failed 6 info

Registration

info

.fr country-code · GIP RENATER · expires 2027-09-28

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
4 September 1995
Last changed
28 September 2026
Expires
28 September 2027
Status
active, auto renew period
Registry nameservers
delta.univ-paris5.fr, descartes0.math-info.univ-paris5.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 2027-09-28 #3
    The registration is valid until 2027-09-28 (341 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

delta.univ-paris5.fr, descartes0.math-info.univ-paris5.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
delta.univ-paris5.fr, descartes0.math-info.univ-paris5.fr
NS in the zone
delta.univ-paris5.fr, descartes0.math-info.univ-paris5.fr
NameserverAddressesNetwork (AS)Glue
delta.univ-paris5.fr193.51.86.4AS2200 FR-RENATER - Renater, FR193.51.86.4
descartes0.math-info.univ-paris5.fr193.48.200.24AS2200 FR-RENATER - Renater, FR193.48.200.24

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: delta.univ-paris5.fr, descartes0.math-info.univ-paris5.fr.
    #6
  • ✓ 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: delta.univ-paris5.fr, descartes0.math-info.univ-paris5.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): 2 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

warn

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
delta.univ-paris5.fr 193.51.86.4NOERROR, 14 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u1-Debian
descartes0.math-info.univ-paris5.fr 193.48.200.24NOERROR, 14 ms, authoritativenoyes / yesrefused9.7.4-P1-RedHat-9.7.4-2.P1.fc14

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: delta.univ-paris5.fr: "9.18.49-1~deb12u1-Debian"; descartes0.math-info.univ-paris5.fr: "9.7.4-P1-RedHat-9.7.4-2.P1.fc14". 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 2026101901 · primary delta.univ-paris5.fr

Found

Primary (MNAME)
delta.univ-paris5.fr
Contact (RNAME)
dnsmaster.univ-paris5.fr
Serial
2026101901
Refresh / retry
21600 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
delta.univ-paris5.fr (193.51.86.4)2026101901
descartes0.math-info.univ-paris5.fr (193.48.200.24)2026101901

Checks

  • ✓ Serial 2026101901 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver delta.univ-paris5.fr is one of the listed nameservers.
  • ✓ Contact dnsmaster@univ-paris5.fr #25
    The SOA RNAME dnsmaster.univ-paris5.fr means dnsmaster@univ-paris5.fr.
  • ✓ Date-based serial #26
    The serial 2026101901 follows the YYYYMMDDnn convention (2026-10-19).

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
193.51.86.4:53
TypeValueTTL
SOAdelta.univ-paris5.fr. dnsmaster.univ-paris5.fr. 2026101901 21600 3600 604800 8640086400
NSdescartes0.math-info.univ-paris5.fr.86400
NSdelta.univ-paris5.fr.86400
MX50 mx1.parisdescartes.fr.600
MX10 mx2.relay.renater.fr.600
MX10 mx1.relay.renater.fr.600

Checks

  • ✓ TTLs within range #32
    TTLs: 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