Domain report: guj.de

Registration

info

.de country-code

Found

TLD: .de (country-code)
ICANN policies apply: no

Checks

i

.de 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

.de is delegated in the root zone and DNSSEC-signed.
i

Registration data not available

No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.

#3

Delegation

warn

dns1.guj.de, dns2.guj.de

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: dns1.guj.de, dns2.guj.de
NS in the zone: dns1.guj.de, dns2.guj.de

Nameserver	Addresses	Network (AS)	Glue
dns1.guj.de	194.12.217.15	AS12680 Gruner-und-Jahr-AS1 - RM Hamburg Holding GmbH, DE	194.12.217.15
dns2.guj.de	194.12.216.15	AS12680 Gruner-und-Jahr-AS1 - RM Hamburg Holding GmbH, DE	194.12.216.15

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.guj.de, dns2.guj.de.

#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: dns1.guj.de, dns2.guj.de.
✓ 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 (AS12680 (Gruner-und-Jahr-AS1 - RM Hamburg Holding GmbH, DE): 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 .de

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

pass

2 of 2 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns1.guj.de 194.12.217.15	NOERROR, 18 ms, authoritative	no	yes / yes	refused	-
dns2.guj.de 194.12.216.15	NOERROR, 20 ms, authoritative	no	yes / yes	refused	-

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.
✓ No version disclosed #17

The nameservers don't reveal their software version.
✓ 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 2015099842 · primary dns1.guj.de

Found

Primary (MNAME): dns1.guj.de
Contact (RNAME): hostmaster.guj.de
Serial: 2015099842
Refresh / retry: 300 s / 3600 s
Expire: 2419200 s
Negative TTL: 900 s

Serial per nameserver

Nameserver	Serial
dns1.guj.de (194.12.217.15)	2015099842
dns2.guj.de (194.12.216.15)	2015099842

Checks

✓ Serial 2015099842 everywhere #22

All nameservers serve the same version of the zone.
!

Unusual SOA timers

refresh 5m is outside 20m–1d; retry 1h should be shorter than refresh 5m. Current values: refresh 5m, retry 1h, expire 28d, negative TTL 15m.

#23
✓ Primary is a public nameserver #24

The primary nameserver dns1.guj.de is one of the listed nameservers.
✓ Contact hostmaster@guj.de #25

The SOA RNAME hostmaster.guj.de means hostmaster@guj.de.
✓ Timestamp serial #26

The serial 2015099842 is a Unix timestamp (2033-11-08 21:57 UTC).

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

27 records at the apex

Found

Read from: 194.12.217.15:53

Type	Value	TTL
SOA	dns1.guj.de. hostmaster.guj.de. 2015099842 300 3600 2419200 900	300
NS	dns2.guj.de.	300
NS	dns1.guj.de.	300
A	52.59.165.42	300
A	18.184.197.212	300
MX	20 sulis.rtl.de.	300
MX	10 assur.rtl.de.	300
MX	10 marduk.rtl.de.	300
MX	20 sul.rtl.de.	300
TXT	"hCl5D18aco1Kwlr+ng3A2WcbVqUTJpyNbXdlo08XLnTVuF3YwE2P3hgOMDZcEmULDIdRaE2SRgzbaInitmJQKA=="	300
TXT	"atlassian-domain-verification=6H0/XTkShFZoklj/wLIrGKjDs8ENkxKpaQaMXZ2KzGIGFh89SJTZOP3NoBb2mO8A"	300
TXT	"apple-domain-verification=VQ9M5Usd0tJJ9oM5"	300
TXT	"facebook-domain-verification=5xhozuygsev0kg2raqjz1oknz74h9j"	300
TXT	"436a2ff1-8720-43ea-8da9-b08db9f54cf0"	300
TXT	"miro-verification=1c83dab373546086000cbf6d9bef9fc575240fce"	300
TXT	"adobe-idp-site-verification=6afb72c9c82f99bfe04f0d867f1ee4d51df22e914fd17ab2966ef833e033c331"	300
TXT	"atlassian-domain-verification=Kl3ByU1tsfV9fKiC7TDDZYz1uCeTeUo0SSEh5SitZ9q99Ua74O571fgiIg//j5Hn"	300
TXT	"MS=ms28725499"	300
TXT	"_fbo47ik58wyhhnvewbqttzs7wg9zcw3"	300
TXT	"asv_domain=f09bb4b18e934d2eb272beb58925d610"	300
TXT	"_61quz3n8vy8yby3qr0gpbaggrz5l6ms"	300
TXT	"v=spf1 ip4:194.12.192.0/19 ip4:194.232.25.221 ip4:193.7.250.235 ip4:165.72.200.0/24 ip4:149.96.13.2 ip4:149.96.14.2 ip4:151.106.144.150 ip4:84.17.184.0/24 ip4:80.252.110.2 ip4:46.20.32.254 ip4:13.69.143.169 " "a:mout.kundenserver.de include:_spf.zimpel.de include:amazonses.com a:sul.rtl.de a:sulis.rtl.de include:spf.protection.outlook.com include:_spf.salesforce.com ~all"	300
TXT	"_upfglwpdo67m8isvjzg7ryqxs37tovv"	300
CAA	0 issue "digicert.com"	3600
CAA	0 issue "sectigo.com"	3600
CAA	0 issue "letsencrypt.org"	3600
CAA	0 issue "amazon.com"	3600

Checks

✓ TTLs within range #32

TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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: digicert.com, sectigo.com, letsencrypt.org, amazon.com.