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88
Total
85
DNS
90
Email
77
Security
100
Network
100
Availability
Domainsystem76.com
IPv44
IPv68
MX records1
StatusActive
Domain technical report

Linux Computers with Linux Preinstalled | System76 Open Source PCs

system76.com

Shop Linux computers with Linux preinstalled. Explore open source computers, Pop!_OS systems, and handcrafted PCs built in the USA.

Generated: 2026-08-10T22:14:27-05:00 · Cached result

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IPv44
IPv68
MX1
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

4 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

8 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

4 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 policy0 / 5 pts · Dns

Certificate authority restriction.

!
DNS propagation0 / 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

94 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: server-3-171-22-66.ord56.r.cloudfront.net

✓
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

4 record(s)
3.171.22.66
3.171.22.98
3.171.22.60
3.171.22.95

AAAA

8 record(s)
2600:9000:289d:f400:13:b3c2:9a40:93a1
2600:9000:289d:aa00:13:b3c2:9a40:93a1
2600:9000:289d:1a00:13:b3c2:9a40:93a1
2600:9000:289d:200:13:b3c2:9a40:93a1
2600:9000:289d:6c00:13:b3c2:9a40:93a1
2600:9000:289d:bc00:13:b3c2:9a40:93a1
2600:9000:289d:d200:13:b3c2:9a40:93a1
2600:9000:289d:7000:13:b3c2:9a40:93a1

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
10 smtp.google.com.

TXT

7 record(s)
"google-site-verification=uOrTPoXzbha1RuiGXNnCvgnA3JJ5IIxvOYY6SF3LM1o"
"google-site-verification=xx3WwkxgEniNho7yJdGpWz6knz56HNampyMKDbZ1LXk"
"google-site-verification=-1gMJEICvk5MYXz4tDCKYwzwRvzEEEqmZ8JFAjwaVT4"
"v=spf1 include:_spf.bigcommerce.com include:mailgun.org include:244821311.spf10.hubspotemail.net include:_spf.google.com ~all"
"google-site-verification=_nAt3KRBtb6jdw1jmIvnwLB39YPJN9qv3y2pylegZY0"
"google-site-verification=7k4ALDufLElL2vaQh5R5nUtne14f_0WdNQnWKPtGem0"
"MS=ms23545818"

NS

4 record(s)
ns-1679.awsdns-17.co.uk.
ns-708.awsdns-24.net.
ns-1154.awsdns-16.org.
ns-404.awsdns-50.com.

SOA

1 record(s)
ns-404.awsdns-50.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 300

CAA

0 record(s)
—

Not configured

DS

1 record(s)
43317 13 2 FA9FE7AA8319A0C54EEE8E275C2C58F7880A18B3AAD7267320C2DD81 926E09B4

DNSKEY

3 record(s)
256 3 13 OLgAeQe7r9XAVVlDpTbN6QfXAIsvKjQvGtvnkM05Fm6VjGLB84ar77Cu l9BoLpwyjlJyi5/v94Mhjr5q/MVVEw==
257 3 13 FB/Q7EFZNvQFcSz7JDjAe5xhjYVQ1Uw6UMa9rkRw0gda3bqfXJBD0qs/ /jsKy1+S54o9Mk2oPmd/RWh0xZQc9g==
256 3 13 Y0NOBHLwpl5KKIB3GDJFo4oyKCf3AGTPpiJ0zdlqb6mNCqrlx7rlPbE/ xciFqyBzvTrXvtvb6TOB+27Ql4VKiw==

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.bigcommerce.com include:mailgun.org include:244821311.spf10.hubspotemail.net include:_spf.google.com ~all

DMARC

Configured
v=DMARC1; p=quarantine; pct=10; rua=mailto:dmarc@system76.com,mailto:d04a0f78@dmarc.mailgun.org,mailto:6697c9cf@inbox.ondmarc.com; ruf=mailto:dmarc@system76.com,mailto:d04a0f78@dmarc.mailgun.org,mailto:6697c9cf@inbox.ondmarc.com;

DKIM

Selector google
v=DKIM1;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv1xtJgHOpX5jr14Az02ljaxYrD1v/L2I9YbR/5dHbmnLJTRWBF7iSerSRqfSChVBRTCyhAiTAvjd6FyEyRRHyaLZ8o4CVLTsAYtwY59aRSeJ/nCQu25LO3uNOpIUSPUfvCL9XeAGt3CHVxVbjiVM2c/5EnfV5kthNq6rR0C6/TpA6fCDPQ2P0ukEM3nSb/RJ0QpZ/SXePWxjRqHGMLal6j6soq783bFawcW/Tq1BBSp/psnJGJwE0xWrXELyEdvNfsqBsHkrYthbVZcyFNmPxY13mlDcWroEJ4dXLXIelAeiS1JV388o8Mn+onp87mvUHl8sAKbnou/VvRANMrpjDwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Linux Computers with Linux Preinstalled | System76 Open Source PCs
Description
Shop Linux computers with Linux preinstalled. Explore open source computers, Pop!_OS systems, and handcrafted PCs built in the USA.
Final URL
https://system76.com/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://system76.com/
Version
3
Server
cloudflare
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Amazon
CN
system76.com
Valid from
2025-10-15T19:00:00-05:00
Valid until
2026-11-13T17:59:59-06:00
Days remaining
94
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

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

DNS propagationComparison across public resolvers

Public resolver comparison

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
54.192.100.21, 54.192.100.24, 54.192.100.31, 54.192.100.91
49,28 ms
Cloudflare
1.1.1.1
3.171.22.60, 3.171.22.66, 3.171.22.95, 3.171.22.98
19,34 ms
Quad9
9.9.9.9
54.192.100.21, 54.192.100.24, 54.192.100.31, 54.192.100.91
41,19 ms
OpenDNS
208.67.222.222
54.192.100.21, 54.192.100.24, 54.192.100.31, 54.192.100.91
30,02 ms
AdGuard
94.140.14.14
54.192.100.21, 54.192.100.24, 54.192.100.31, 54.192.100.91
127,63 ms

IP, geolocation and ASNAssociated network information

3.171.22.66

No data
success
No
country
region
city
asn
organization
isp

3.171.22.98

No data
success
No
country
region
city
asn
organization
isp

3.171.22.60

No data
success
No
country
region
city
asn
organization
isp

3.171.22.95

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

smtp.google.com

Port 25: Closed/unreachable - 21.8 ms - 220 mx.google.com ESMTP 006d021491bc7-6b0a017fdcbsi253716eaf.54 - gsmtp
Port 465: Closed/unreachable - 4019.6 ms - 
Port 587: Closed/unreachable - 4020 ms -

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