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86
Total
100
DNS
90
Email
96
Security
70
Network
60
Availability
Domainpacktpub.com
IPv42
IPv62
MX records1
StatusActive
Domain technical report

Just a moment...

packtpub.com

Generated: 2026-08-09T10:38:36-05:00 · Cached result

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IPv42
IPv62
MX1
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

2 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

2 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

✓
DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

1 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

89 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers31 / 35 pts · Security

8 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓
IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓
IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

!
HTTP response0 / 40 pts · Availability

HTTP/2 403

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)
104.18.18.57
104.18.19.57

AAAA

2 record(s)
2606:4700::6812:1239
2606:4700::6812:1339

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
0 packtpub-com.mail.protection.outlook.com.

TXT

10 record(s)
"MS=ms77079791"
"google-site-verification=4IqRPigqD2-cUnB7oyC8vW9hJVPD-1CklhbG2CzYcKk"
"_globalsign-domain-verification=6RYPIPUO2OQDU0pqaDmaEeWmISV7Tz3QQBCYgOv3br"
"_globalsign-domain-verification=HYZk2Fhot5-PhJD3xTIrZBWcnuIiOpkPMyjRmQ2z5L"
"google-site-verification=EhrsgJ1xswy57ujWukxssZc7LkxKzr_k5GCWDF68sgk"
"_globalsign-domain-verification=Iiihy-iv_vLdlIMtHvh-aCdqO2T53oCoknhW44njXn"
"v=spf1  a:zgateway.zuora.com include:spf.protection.outlook.com include:servers.mcsv.net include:spf.mandrillapp.com include:sendgrid.net include:amazonses.com -all"
"facebook-domain-verification=m4iqhvdyzgnt1rtxtdfzrsypf63gi8"
"google-gws-recovery-domain-verification=67085002"
"google-site-verification=aYn6H9fduNTMAWna17iNt1G1VNPxaakxn2Vta5qgok0"

NS

2 record(s)
max.ns.cloudflare.com.
eva.ns.cloudflare.com.

SOA

1 record(s)
eva.ns.cloudflare.com. dns.cloudflare.com. 2411731825 10000 2400 604800 1800

CAA

12 record(s)
0 issuewild "letsencrypt.org"
0 issuewild "awstrust.com"
0 issuewild "amazonaws.com"
0 issuewild "amazon.com"
0 issue "amazonaws.com"
0 iodef "mailto:caa.notification@packt.com"
0 issuewild "amazontrust.com"
0 issue "awstrust.com"
0 issue "amazontrust.com"
0 issue "pki.goog; cansignhttpexchanges=yes"
0 issue "letsencrypt.org"
0 issue "amazon.com"

DS

1 record(s)
2371 13 2 164829D1F36A57B64307E6D78110A347E2993F1717DB63E31D682BAC 8723A857

DNSKEY

2 record(s)
256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==
257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==

RRSIG

5 record(s)
NS 13 2 86400 20260810163827 20260808143827 34505 packtpub.com. WgKz4JbOpX1Mvf1Z7uVpcbPGtDdczn7XsPXqWnE9YRnUGA2r8hPjkWR+ Qmg+UjU1tlMMjfEBbkGZFwp5mCS/jQ==
AAAA 13 2 300 20260810163826 20260808143826 34505 packtpub.com. 53lzWIAiE2+z78Xh50Hy6MIG3KJoEkFbqXOnsCS9H8wF0jRQRBACa6tm hbtL+8FzIxdm4R4zMCAYeXD3M9wwNQ==
A 13 2 300 20260810163826 20260808143826 34505 packtpub.com. T6idU7bAw4PFpb304Mc1fkpXzXIkIOFb4Lyfc/UhOWpcXvBXZN1puUOS uXfLX+fPNo2vIZpecTM7REdU0xD8ow==
DS 13 2 86400 20260814021616 20260807010616 41446 com. HLUBkpPOUlTCs1lDui41rin9b57j1nqRnAhlBq96gmjHr5wmA11SCtNm k6M8DFI7i3j42IUO/WN7ar0VZV2Kqw==
CAA 13 2 300 20260810163827 20260808143827 34505 packtpub.com. 3bTbPyeR3GD8LBBQzv3M6xHbMqqXSUzEJ+huKDzfVASMkL18DbMF+AxW dFU8RZIt74zWx0gSyow2Cn/Ht9og0A==

NSEC

1 record(s)
\000.packtpub.com. A NS SOA PTR HINFO MX TXT AAAA LOC SRV NAPTR CERT SSHFP RRSIG NSEC DNSKEY TLSA SMIMEA HIP CDS CDNSKEY OPENPGPKEY SVCB HTTPS URI CAA

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1  a:zgateway.zuora.com include:spf.protection.outlook.com include:servers.mcsv.net include:spf.mandrillapp.com include:sendgrid.net include:amazonses.com -all

DMARC

Configured
v=DMARC1; p=quarantine; rua=mailto:d6a1cd89fcd04666b54028a47908aeeb@dmarc-reports.cloudflare.net,mailto:reportdmarc@packtpub.com; ruf=mailto:reportdmarc@packtpub.com; sp=quarantine

DKIM

Selector selector1
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCHoiCWDW2kOtwBVdfrkOsRz+QRV5oPjvVM820n+/+CJTrLj/sRfFKTZ2ZVLAL66Vqi0tzyG3DwPfiG5z3qDs+Sc3OWwXFvlJD20KK5Zy07/cGVqvwgpTX5HPJtucgZEy6AtUDl4bqGtUDMgDuMkmoWaT9JBctLs9U+9zGk7cJMQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Just a moment...
Description
Final URL
https://packtpub.com/
HTTP status
403

HTTP

Status
HTTP/2 403
Final URL
https://packtpub.com/
Version
3
Server
cloudflare
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
packtpub.com
Valid from
2026-08-08T21:30:08-05:00
Valid until
2026-11-06T20:30:07-06:00
Days remaining
89
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

8 active
—
HSTSNot detected
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
✓
Permissions PolicyImplemented
✓
Cross-Origin-Opener-PolicyImplemented
✓
Cross-Origin-Embedder-PolicyImplemented
✓
Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
104.18.18.57, 104.18.19.57
52,53 ms
Cloudflare
1.1.1.1
104.18.18.57, 104.18.19.57
44,99 ms
Quad9
9.9.9.9
104.18.18.57, 104.18.19.57
34,22 ms
OpenDNS
208.67.222.222
104.18.18.57, 104.18.19.57
33,45 ms
AdGuard
94.140.14.14
104.18.18.57, 104.18.19.57
59,92 ms

IP, geolocation and ASNAssociated network information

104.18.18.57

No data
success
No
country
region
city
asn
organization
isp

104.18.19.57

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

packtpub-com.mail.protection.outlook.com

Port 25: Closed/unreachable - 22.7 ms - 
Port 465: Closed/unreachable - 4009.3 ms - 
Port 587: Closed/unreachable - 4036.6 ms -

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