messe-essen.de

Checked 21 October 2026, 23:22 UTC · via 8.8.8.8
✗Problems found
21 passed 3 warnings 1 failed 4 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

warn

ns1.kompool.de, ns2.kompool.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.kompool.de, ns2.kompool.net
NS in the zone
ns1.kompool.de, ns2.kompool.net
NameserverAddressesNetwork (AS)Glue
ns1.kompool.de145.253.168.11AS3209 VODANET - Vodafone GmbH, DE145.253.168.11
ns2.kompool.net85.215.42.239AS8560 IONOS-AS - IONOS SE, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.kompool.de, ns2.kompool.net.
    #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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS3209 (VODANET - Vodafone GmbH, DE): 1 address; AS8560 (IONOS-AS - IONOS SE, DE): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.kompool.de 145.253.168.11NOERROR, 11 ms, authoritativenoyes / yesALLOWED (114 records)Get Lost Pal
ns2.kompool.net 85.215.42.239NOERROR, 9 ms, authoritativenoyes / yesALLOWED (114 records)9.18.39-0ubuntu0.22.04.7-Ubuntu

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: ns2.kompool.net: "9.18.39-0ubuntu0.22.04.7-Ubuntu". Hide or replace the version string.
    #17
  • ✗
    Zone transfer allowed
    These nameservers send the complete zone to anyone who asks (AXFR), exposing all host names: ns1.kompool.de (145.253.168.11): 114 records; ns2.kompool.net (85.215.42.239): 114 records. Restrict zone transfers to your secondary servers.
    #18
  • ✓ 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 2017030991 · primary ns1.kompool.de

Found

Primary (MNAME)
ns1.kompool.de
Contact (RNAME)
w3root.kompool.de
Serial
2017030991
Refresh / retry
14400 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.kompool.de (145.253.168.11)2017030991
ns2.kompool.net (85.215.42.239)2017030991

Checks

  • ✓ Serial 2017030991 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.kompool.de is one of the listed nameservers.
  • ✓ Contact w3root@kompool.de #25
    The SOA RNAME w3root.kompool.de means w3root@kompool.de.
  • ✓ Date-based serial #26
    The serial 2017030991 follows the YYYYMMDDnn convention (2017-03-09).

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

8 records at the apex

Found

Read from
145.253.168.11:53
TypeValueTTL
SOAns1.kompool.de. w3root.kompool.de. 2017030991 14400 3600 604800 864003600
NSns1.kompool.de.3600
NSns2.kompool.net.3600
A185.150.51.2293600
MX10 mx.essen.de.3600
TXT"v=spf1 a:smtp.kompool.de ip4:159.69.217.93 ip4:23.88.100.164 include:essen.de include:spfa.myconvento.com ~all"3600
TXT"_globalsign-domain-verification=jvyDO7EOHM_3kKOBvP9-yQwSCYuhZ4VFTqfycQVRmw"3600
TXT"Yc/+utxQbeXIvvHgverISRQv3B8EKVd7W3cYqzz/UeU="3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, 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