haufe-akademie.de

Checked 21 October 2026, 22:42 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 0 failed 6 info

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

info

ns1.haufegroup.de, ns2.haufegroup.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.haufegroup.de, ns2.haufegroup.com
NS in the zone
ns1.haufegroup.de, ns2.haufegroup.com
NameserverAddressesNetwork (AS)Glue
ns1.haufegroup.de192.174.68.103 2001:67c:1bc::103AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT192.174.68.103 2001:67c:1bc::103
ns2.haufegroup.com176.97.158.103 2001:67c:10b8::103AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.haufegroup.de, ns2.haufegroup.com.
    #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 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1921 (RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .de.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.haufegroup.de 192.174.68.103NOERROR, 3 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns1.haufegroup.de 2001:67c:1bc::103NOERROR, 4 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns2.haufegroup.com 176.97.158.103NOERROR, 11 ms, authoritativenoyes / yesrefusedreg-wie1
ns2.haufegroup.com 2001:67c:10b8::103NOERROR, 12 ms, authoritativenoyes / yesrefusedreg-wie1

Checks

  • ✓ All respond #14
    All 4 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.haufegroup.de: "RcodeZero DNS"; ns2.haufegroup.com: "reg-wie1".
    #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 1791207123 · primary ns1.haufegroup.de

Found

Primary (MNAME)
ns1.haufegroup.de
Contact (RNAME)
dnsmanager.haufe-lexware.com
Serial
1791207123
Refresh / retry
14400 s / 1800 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns1.haufegroup.de (192.174.68.103)1791207123
ns1.haufegroup.de (2001:67c:1bc::103)1791207123
ns2.haufegroup.com (176.97.158.103)1791207123
ns2.haufegroup.com (2001:67c:10b8::103)1791207123

Checks

  • ✓ Serial 1791207123 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 30m, expire 14d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.haufegroup.de is one of the listed nameservers.
  • ✓ Contact dnsmanager@haufe-lexware.com #25
    The SOA RNAME dnsmanager.haufe-lexware.com means dnsmanager@haufe-lexware.com.
  • ✓ Timestamp serial #26
    The serial 1791207123 is a Unix timestamp (2026-10-05 13:32 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

info

32 records at the apex

Found

Read from
192.174.68.103:53
TypeValueTTL
SOAns1.haufegroup.de. dnsmanager.haufe-lexware.com. 1791207123 14400 1800 1209600 360086400
NSns1.haufegroup.de.3600
NSns2.haufegroup.com.3600
A217.31.85.1233600
MX10 mail2.haufe.de.900
MX20 mail3.haufe.de.900
MX30 mail.haufe.de.900
TXT"MS=ms68274215"3600
TXT"00D0Q0000008dSF=1TB9Z0000000MVB"3600
TXT"00D24000000GyjS=1TBQF0000000Gsn"3600
TXT"00D9V00000Q1EA2=1TB9V0000000W1V"3600
TXT"52d8w813r9mt5s0y207dfxfk7x72zx0t"3600
TXT"_3o9jw30v1nu2hwqxgbx9ejt39enqdv6"3600
TXT"_n7ltufmnirooqihoh6kk6ywbmcz4eww"3600
TXT"cd1v8bqt4x0xqm91ds89t6rm5p8q0rl1"3600
TXT"h497f1w0504qrcxjwbh74cv9846ww47h"3600
TXT"swisssign-check=-AHYdsLHcuy471M_BmoIi9cYGFM"3600
TXT"docusign=b842977f-4d29-450c-98e1-39dfca930dc8"3600
TXT"tr-domain-verification=3dIuGO0NxpxsZffaCW8of2"3600
TXT"canva-site-verification=om4i6lAO3c793gi8qPjlNg"3600
TXT"openai-domain-verification=dv-oGJXqrtDs9laOEIwdRyRwE64"3600
TXT"miro-verification=1a8aadfbc235c88ba98d1c4d2ecbf87dfd1b8e30"3600
TXT"v=spf1 ip4:217.31.85.123 include:haufe.de include:spf.protection.outlook.com -all"3600
TXT"2FXpiJz027wAyL0f92V1bc+A079QyYJUzXE8wghWZb/9lWjpleSr8lpQYZSxYOXPDpQ1+GNlI8KHB/A/NjHilg=="3600
TXT"TMatJrdUtpjO/i8v6nnto7IYU0wRvap4fKwZfOoSLfq3Me7icfPDBjTYa29GLyCCXAIqt0mhtbf+Y6X0PA8dLA=="3600
TXT"n9fsLYnTQFDHR0q2zK3yNI1pnHktwdDiGnrhAhHJ4zHkEFrUN2WulJw0JI8Y+D5DPuOy33QQl7WAptmQ4Jtffw=="3600
TXT"wiz-domain-verification=4c451bc4bb93c04ed0fd98bc7b26726c956cfa5e63dec58354df36bc289c53b2"3600
TXT"ciscocidomainverification=1919a01ad638bdf7116603bf57775af10857e3defacd2e25aacd817c8880764c"3600
TXT"adobe-idp-site-verification=441bf1ea14ccc7c1a6bce109a8b1b5308b0d0d0e128dbaf72e08fff3e90cf1ec"3600
TXT"cisco-ci-domain-verification=205dfe4de447114337596ea6e28e2637b25cf7ec6d4df6a202e13e33f4972eb5"3600
TXT"webexdomainverification.4C675B8BA195B136E053AB06FC0A3F65=06593580-099a-4b34-8b8d-5300f72e007c"3600
TXT"figma-domain-verification=e94c31cd9aa917e52d114010f0361a1111ef4b62e85ca2e399c8b072943e3911-1734686532"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 15m, NS 1h. The NS TTL at the parent is 1d and in the zone 1h; 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