insa-strasbourg.fr

Checked 22 October 2026, 03:30 UTC · via 8.8.8.8
✗Problems found
21 passed 3 warnings 2 failed 5 info

Registration

info

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

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
5 May 2003
Last changed
30 June 2026
Expires
5 May 2027
Status
active
Registry nameservers
ns1.u-strasbg.fr, ns2.u-strasbg.fr, shiva.jussieu.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 2027-05-05 #3
    The registration is valid until 2027-05-05 (195 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

ns1.u-strasbg.fr, ns2.u-strasbg.fr, shiva.jussieu.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
ns1.u-strasbg.fr, ns2.u-strasbg.fr, shiva.jussieu.fr
NS in the zone
ns1.u-strasbg.fr, ns2.u-strasbg.fr, shiva.jussieu.fr
NameserverAddressesNetwork (AS)Glue
ns1.u-strasbg.fr130.79.200.1 2001:660:2402::1AS2259 FR-RAREST - Renater, EU AS2200 FR-RENATER - Renater, FR130.79.200.1 2001:660:2402::1
ns2.u-strasbg.fr130.79.200.3 2001:660:2402::3AS2259 FR-RAREST - Renater, EU AS2200 FR-RENATER - Renater, FR130.79.200.3 2001:660:2402::3
shiva.jussieu.fr134.157.0.129AS1307 UNSPECIFIED - Renater, EU134.157.0.129

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.u-strasbg.fr, ns2.u-strasbg.fr, shiva.jussieu.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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:660:2402::/48, while the other address family is spread over several networks.
    #10
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS1307 (UNSPECIFIED - Renater, EU): 1 address; AS2200 (FR-RENATER - Renater, FR): 2 addresses; AS2259 (FR-RAREST - Renater, EU): 2 addresses.
  • 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: shiva.jussieu.fr.
    #13

Nameservers

fail

4 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.u-strasbg.fr 130.79.200.1NOERROR, 23 ms, authoritativenoyes / yesrefused9.20.24-1ubuntu0.4-Ubuntu
ns1.u-strasbg.fr 2001:660:2402::1NOERROR, 25 ms, authoritativenoyes / yesrefused9.20.24-1ubuntu0.4-Ubuntu
ns2.u-strasbg.fr 130.79.200.3NOERROR, 24 ms, authoritativenoyes / yesrefused9.20.24-1ubuntu0.4-Ubuntu
ns2.u-strasbg.fr 2001:660:2402::3NOERROR, 25 ms, authoritativenoyes / yesrefused9.20.24-1ubuntu0.4-Ubuntu
shiva.jussieu.fr 134.157.0.129REFUSED, 13 ms, NOT authoritativenono / yesrefused-

Checks

  • ✓ All respond #14
    All 5 nameserver addresses answered.
  • ✗
    Lame delegation
    These nameservers don't answer authoritatively for the zone, so resolvers ignore them: shiva.jussieu.fr (134.157.0.129): REFUSED, authoritative=false.
    #15
  • ✓ 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: ns1.u-strasbg.fr: "9.20.24-1ubuntu0.4-Ubuntu"; ns2.u-strasbg.fr: "9.20.24-1ubuntu0.4-Ubuntu". 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: shiva.jussieu.fr (134.157.0.129): .
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 2026102103 · primary ns1.u-strasbg.fr

Found

Primary (MNAME)
ns1.u-strasbg.fr
Contact (RNAME)
hostmaster.insa-strasbourg.fr
Serial
2026102103
Refresh / retry
3600 s / 3600 s
Expire
3600000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns1.u-strasbg.fr (130.79.200.1)2026102103
ns1.u-strasbg.fr (2001:660:2402::1)2026102103
ns2.u-strasbg.fr (130.79.200.3)2026102103
ns2.u-strasbg.fr (2001:660:2402::3)2026102103

Checks

  • ✓ Serial 2026102103 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 1000h, negative TTL 1h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.u-strasbg.fr is one of the listed nameservers.
  • ✓ Contact hostmaster@insa-strasbourg.fr #25
    The SOA RNAME hostmaster.insa-strasbourg.fr means hostmaster@insa-strasbourg.fr.
  • ✓ Date-based serial #26
    The serial 2026102103 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

pass

11 records at the apex

Found

Read from
130.79.200.1:53
TypeValueTTL
SOAns1.u-strasbg.fr. hostmaster.insa-strasbourg.fr. 2026102103 3600 3600 3600000 36001800
NSshiva.jussieu.fr.1800
NSns1.u-strasbg.fr.1800
NSns2.u-strasbg.fr.1800
MX3 mx2.relay.renater.fr.1800
MX3 mx1.relay.renater.fr.1800
TXT"MS=0AFFC62EF885C37E2E087A85FEAFB7AE3C17D1B5"3600
TXT"v=spf1 include:spf.relay.renater.fr include:spf.partage.renater.fr include:spf.protection.outlook.com ip4:130.79.222.208/28 ip6:2001:660:2402:1b::/64 ip4:134.214.182.44 ~all"3600
TXT"HARICA-KurmRxJDLoSGjHvVJhn"3600
CAA0 issue "harica.gr"1800
CAA0 issuewild "harica.gr"1800

Checks

  • ✓ TTLs within range #32
    TTLs: MX 30m, NS 30m. The NS TTL at the parent is 1h and in the zone 30m; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: harica.gr.