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87
Total
85
DNS
90
Email
84
Security
70
Network
100
Availability
Domaintecmint.com
IPv43
IPv63
MX records5
StatusActive
Domain technical report

TecMint: Linux Howtos, Tutorials & Guides

tecmint.com

TecMint is the largest free Linux resource on the web, covering tutorials, commands, tools, and guides for sysadmins, DevOps engineers, and Linux beginners.

Generated: 2026-08-10T08:22:53-05:00 · Cached result

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IPv43
IPv63
MX5
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

3 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

3 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 chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

5 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

85 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers19 / 35 pts · Security

5 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 response40 / 40 pts · Availability

HTTP/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

3 record(s)
104.26.2.23
104.26.3.23
172.67.72.207

AAAA

3 record(s)
2606:4700:20::681a:217
2606:4700:20::ac43:48cf
2606:4700:20::681a:317

CNAME

0 record(s)
—

Not configured

MX

5 record(s)
5 alt1.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
10 alt3.aspmx.l.google.com.
1 aspmx.l.google.com.
10 alt4.aspmx.l.google.com.

TXT

2 record(s)
"google-site-verification=Lm2_CHFkgECZgEzZiN-gzDJYEF-xw7OMoGrpvemM-rs"
"v=spf1 include:_spf.google.com include:_spf.mlsend.com include:amazonses.com ~all"

NS

2 record(s)
lex.ns.cloudflare.com.
lara.ns.cloudflare.com.

SOA

1 record(s)
lara.ns.cloudflare.com. dns.cloudflare.com. 2411651071 10000 2400 604800 1800

CAA

10 record(s)
0 issuewild "letsencrypt.org"
0 issue "comodoca.com"
0 issuewild "comodoca.com"
0 issue "letsencrypt.org"
0 issue "pki.goog; cansignhttpexchanges=yes"
0 issuewild "pki.goog; cansignhttpexchanges=yes"
0 issue "ssl.com"
0 issue "digicert.com; cansignhttpexchanges=yes"
0 issuewild "ssl.com"
0 issuewild "digicert.com; cansignhttpexchanges=yes"

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

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 include:_spf.google.com include:_spf.mlsend.com include:amazonses.com ~all

DMARC

Configured
v=DMARC1; p=none; fo=1; rua=mailto:admin@tecmint.com; ruf=mailto:admin@tecmint.com

DKIM

Selector google
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAju3nzhEkbKiNpjxzjPiUdQC2z3F+X9E2Kw8c/WZblWR3bqpkhq4U1np2dtfHf18zWcAn+yY5gRHyS7v/Gu8Gynw9DSpA+OTOqCJLFIJnSE3jKOiJ8jZvVjJ2wCoEoaoSPcxmwm1Lq03F32hs4TWU2r0iHA985cFFwWK1RKQgD/OQnPI7Lc7R8jB59r6WnXMgmVzHqamYrcKVRxVe9mfrq1d1rk+XgfmaRsmlK9o+gT1Ash7o+aicR7TlIG6ALGbQk5erhS2at+9Sc6rQFpSQE5PPFIqGWAYetpr41BED8L/l0azUqB2rp3DmhOUYB/ZhcJV7vnSxU5ZwFWW1jzKo9QIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
TecMint: Linux Howtos, Tutorials & Guides
Description
TecMint is the largest free Linux resource on the web, covering tutorials, commands, tools, and guides for sysadmins, DevOps engineers, and Linux beginners.
Final URL
https://www.tecmint.com/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.tecmint.com/
Version
3
Server
cloudflare
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Google Trust Services
CN
tecmint.com
Valid from
2026-08-05T20:35:33-05:00
Valid until
2026-11-03T20:34:52-06:00
Days remaining
85
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

5 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
✓
Permissions PolicyImplemented
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
104.26.2.23, 104.26.3.23, 172.67.72.207
59,98 ms
Cloudflare
1.1.1.1
104.26.2.23, 104.26.3.23, 172.67.72.207
44,67 ms
Quad9
9.9.9.9
104.26.2.23, 104.26.3.23, 172.67.72.207
41,60 ms
OpenDNS
208.67.222.222
104.26.2.23, 104.26.3.23, 172.67.72.207
43,19 ms
AdGuard
94.140.14.14
104.26.2.23, 104.26.3.23, 172.67.72.207
71,91 ms

IP, geolocation and ASNAssociated network information

104.26.2.23

No data
success
No
country
region
city
asn
organization
isp

104.26.3.23

No data
success
No
country
region
city
asn
organization
isp

172.67.72.207

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

alt1.aspmx.l.google.com

Port 25: Closed/unreachable - 0.9 ms - 
Port 465: Closed/unreachable - 4002.6 ms - 
Port 587: Closed/unreachable - 4021.2 ms -

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