tryhackme.com

Checked 22 October 2026, 11:13 UTC · via 8.8.8.8
!Passed with warnings
24 passed 3 warnings 0 failed 4 info

Registration

info

.com generic · NameCheap, Inc. · expires 2034-07-05

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
NameCheap, Inc.
Registered
5 July 2018
Last changed
11 May 2025
Expires
5 July 2034
Status
client transfer prohibited
Registry nameservers
kip.ns.cloudflare.com, uma.ns.cloudflare.com
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2034-07-05 #3
    The registration is valid until 2034-07-05 (2813 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

kip.ns.cloudflare.com, uma.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
kip.ns.cloudflare.com, uma.ns.cloudflare.com
NS in the zone
kip.ns.cloudflare.com, uma.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
kip.ns.cloudflare.com173.245.59.128 108.162.193.128 172.64.33.128 2606:4700:58::adf5:3b80 2803:f800:50::6ca2:c180 2a06:98c1:50::ac40:2180AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.193.128 172.64.33.128 173.245.59.128 2606:4700:58::adf5:3b80 2803:f800:50::6ca2:c180 2a06:98c1:50::ac40:2180
uma.ns.cloudflare.com108.162.192.146 172.64.32.146 173.245.58.146 2803:f800:50::6ca2:c092 2a06:98c1:50::ac40:2092 2606:4700:50::adf5:3a92AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.192.146 172.64.32.146 173.245.58.146 2606:4700:50::adf5:3a92 2803:f800:50::6ca2:c092 2a06:98c1:50::ac40:2092

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: kip.ns.cloudflare.com, uma.ns.cloudflare.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 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 12 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 .com
    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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
kip.ns.cloudflare.com 173.245.59.128NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
kip.ns.cloudflare.com 108.162.193.128NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
kip.ns.cloudflare.com 172.64.33.128NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
kip.ns.cloudflare.com 2606:4700:58::adf5:3b80NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
kip.ns.cloudflare.com 2803:f800:50::6ca2:c180NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
kip.ns.cloudflare.com 2a06:98c1:50::ac40:2180NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 108.162.192.146NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 172.64.32.146NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 173.245.58.146NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 2803:f800:50::6ca2:c092NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 2a06:98c1:50::ac40:2092NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 2606:4700:50::adf5:3a92NOERROR, 4 ms, authoritativenoyes / yesrefused2026.10.2

Checks

  • ✓ All respond #14
    All 12 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: kip.ns.cloudflare.com: "2026.10.2"; uma.ns.cloudflare.com: "2026.10.2". 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.

SOA

pass

serial 2417876417 · primary kip.ns.cloudflare.com

Found

Primary (MNAME)
kip.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417876417
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
kip.ns.cloudflare.com (173.245.59.128)2417876417
kip.ns.cloudflare.com (108.162.193.128)2417876417
kip.ns.cloudflare.com (172.64.33.128)2417876417
kip.ns.cloudflare.com (2606:4700:58::adf5:3b80)2417876417
kip.ns.cloudflare.com (2803:f800:50::6ca2:c180)2417876417
kip.ns.cloudflare.com (2a06:98c1:50::ac40:2180)2417876417
uma.ns.cloudflare.com (108.162.192.146)2417876417
uma.ns.cloudflare.com (172.64.32.146)2417876417
uma.ns.cloudflare.com (173.245.58.146)2417876417
uma.ns.cloudflare.com (2803:f800:50::6ca2:c092)2417876417
uma.ns.cloudflare.com (2a06:98c1:50::ac40:2092)2417876417
uma.ns.cloudflare.com (2606:4700:50::adf5:3a92)2417876417

Checks

  • ✓ Serial 2417876417 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver kip.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2417876417 is a Unix timestamp (2046-08-14 16:20 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

warn

31 records at the apex

Found

Read from
173.245.59.128:53
TypeValueTTL
SOAkip.ns.cloudflare.com. dns.cloudflare.com. 2417876417 10000 2400 604800 18001800
NSkip.ns.cloudflare.com.86400
NSuma.ns.cloudflare.com.86400
A64.239.123.6573
A64.239.109.6573
MX1 aspmx.l.google.com.300
MX10 alt3.aspmx.l.google.com.300
MX10 alt4.aspmx.l.google.com.300
MX5 alt1.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
TXT"6ca7e8e9845fa51969caa46c95cf230d"60
TXT"anthropic-domain-verification-azydkj=zpI52q9Mi6RXuR8EflRqMe6q1"60
TXT"apple-domain-verification=pCnn4LGO5VSU5XSs"60
TXT"google-site-verification=AlFrMBXuBQ-zDeey1Qo8m0dRJRUrrNBMnFa4r4aX4gI"60
TXT"google-site-verification=GCyTff0OB7u9Z0DvK942SCYTy1hLYcwWvalZWlRFbCs"60
TXT"google-site-verification=umR4x8HuzWMF5g3656JY1b-61NuryD0-GqGnYN13ONo"60
TXT"v=spf1 include:_spf.google.com include:email.chargebee.com include:7168674.spf05.hubspotemail.net ~all"60
TXT"zapier-domain-verification-challenge=267a6fd6-7041-48fe-ba4b-02d72fe60413"60
CAA0 issue "amazonaws.com"60
CAA0 issue "certainly.com"60
CAA0 issue "comodoca.com"60
CAA0 issue "digicert.com; cansignhttpexchanges=yes"60
CAA0 issue "letsencrypt.org"60
CAA0 issue "pki.goog; cansignhttpexchanges=yes"60
CAA0 issue "ssl.com"60
CAA0 issuewild "amazonaws.com"60
CAA0 issuewild "comodoca.com"60
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"60
CAA0 issuewild "letsencrypt.org"60
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"60
CAA0 issuewild "ssl.com"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m13s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
    #32
  • ✓ 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: amazonaws.com, certainly.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.