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SGSiteGraph

centos.org

The CentOS Project

Last scanned Jul 18, 2026, 8:49 PM

82

Overall score

Great

Top issues to fix

8 issues found · 3 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • Missing canonical link

    SEO

    Add <link rel="canonical"> so search engines know which URL variant to index.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

  • Missing OpenGraph tags

    SEO

    Add og:title/og:description/og:image so shared links render a proper preview card.

+2 more issues — details in the sections below.

Summary

This website uses Apache hosted on AWS. SEO is fair (55/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Missing meta description.

55

SEO

6 issue(s) found

100

Performance

122 ms

90

Security

HTTPS & header checks

90

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

YouTubeFacebookLinkedInX (Twitter)

Meta tags

Title
The CentOS Project
Description
Canonical
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1.0, shrink-to-fit=no
Robots meta
Manifest
https://www.centos.org/site.webmanifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

BootstrapApache

Hosting & CDN

Hosting provider
AWS
CDN provider
—
IP address
52.56.83.118
ASN
AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

TypeValue
A
  • 52.56.83.118
  • 81.171.33.202
  • 81.171.33.201
AAAA
  • 2001:4de0:aaae::202
  • 2001:4de0:aaae::201
  • 2a05:d01c:c6a:cc02:225e:ab54:d58c:8b14
MX
  • mail.centos.org
TXT
  • google-site-verification=xFWz31gRBrIYS5zOQLeT6oY88Z2UPuW031lo3iGaXBI
  • libera-1239sd9
  • v=spf1 mx ip4:8.43.84.214 ip4:8.43.84.213 ip6:2620:52:3::214ip4:8.43.84.199 ip4:8.43.84.213 ip6:2620:52:3::214 ip4:8.43.84.214 ip4:38.145.33.27 ip6:2620:52:6:2111::47 -all
NS
  • ns1.centos.org
  • ns2.centos.org
CAA
  • 0 issue "amazon.com"
  • 0 issue "digicert.com"
  • 0 issuewild "digicert.com"
  • 0 issuewild "letsencrypt.org"
  • 0 issue "letsencrypt.org"
CNAME—
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
centos.org
Valid from
May 26, 2026
Valid to
Aug 24, 2026
Days until expiry
36
SAN domains
centos.org, www.centos.org

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyEnabled
  • Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 3 · H3 0

Links

22 internal · 75 external · 1 broken

Images

46 total · 0 missing alt

Scripts / Styles

7 scripts · 6 stylesheets

JS / CSS size

79.3 KB · 297 KB

Page size

41.7 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
1
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing meta description
  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • sitemap.xml not found

Accessibility issues

  • No H1 heading found

Scan details

Requested URL
https://centos.org
Final URL
https://centos.org
HTTP status
200
HTTP version
HTTP/1.1
Response time
122 ms
HTML size
41.7 KB
Redirect chain
https://centos.org

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Frequently asked questions

What technology does centos.org use?
centos.org is built with Bootstrap, Apache.
Is centos.org secure (HTTPS)?
Yes. centos.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Aug 24, 2026.
Who hosts centos.org?
centos.org is hosted on AWS.
What is centos.org's SEO score?
centos.org scored 55/100 for SEO in the latest analysis (fair).
What is centos.org's overall website score?
centos.org has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.