Domain report: cns.fr

Registration

info

.fr country-code · GIP RENATER · expires 2027-09-23

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.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 2027-09-23 #3

The registration is valid until 2027-09-23 (336 days).
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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.

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condatis.genoscope.cns.fr, rosmerta.cnrgh.fr

Nameserver	Addresses	Network (AS)	Glue
condatis.genoscope.cns.fr	195.83.221.40	AS2200 FR-RENATER - Renater, FR	195.83.221.40
rosmerta.cnrgh.fr	193.50.3.8	AS2200 FR-RENATER - Renater, FR	193.50.3.8

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: condatis.genoscope.cns.fr, rosmerta.cnrgh.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: condatis.genoscope.cns.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.
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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
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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

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2 of 2 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
condatis.genoscope.cns.fr 195.83.221.40	NOERROR, 18 ms, authoritative	no	yes / yes	refused	9.16.23-RH
rosmerta.cnrgh.fr 193.50.3.8	NOERROR, 14 ms, authoritative	no	yes / yes	refused	9.16.23-RH

✓ 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: condatis.genoscope.cns.fr: "9.16.23-RH"; rosmerta.cnrgh.fr: "9.16.23-RH". 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.

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serial 2024094917 · primary ns3.genoscope.cns.fr

Nameserver	Serial
condatis.genoscope.cns.fr (195.83.221.40)	2024094917
rosmerta.cnrgh.fr (193.50.3.8)	2024094917

✓ Serial 2024094917 everywhere #22

All nameservers serve the same version of the zone.
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Unusual SOA timers

negative caching TTL (minimum) 2d is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 6h, retry 1h, expire 1000h, negative TTL 2d.

#23
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Hidden master (not resolvable)

The primary nameserver ns3.genoscope.cns.fr is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.

#24
✓ Contact hostmaster@genoscope.cns.fr #25

The SOA RNAME hostmaster.genoscope.cns.fr means hostmaster@genoscope.cns.fr.
✓ Timestamp serial #26

The serial 2024094917 is a Unix timestamp (2034-02-21 00:35 UTC).

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Not signed

info

6 records at the apex

Type	Value	TTL
SOA	ns3.genoscope.cns.fr. hostmaster.genoscope.cns.fr. 2024094917 21600 3600 3600000 172800	172800
NS	rosmerta.cnrgh.fr.	172800
NS	condatis.genoscope.cns.fr.	172800
MX	10 smtp-fw.ibfj-evry.fr.	900
TXT	"v=spf1 +a:ares.genoscope.cns.fr/32 +a:smtp3.genoscope.cns.fr/32 +a:hermes.genoscope.cns.fr/32 -all"	172800
TXT	"1p145k49pm85vm3t6g8t63f4gsrqd4r6"	172800

✓ TTLs within range #32

TTLs: MX 15m, NS 2d. The NS TTL at the parent is 1h and in the zone 2d; 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.
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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