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SGSiteGraph

gmplib.org

The GNU MP Bignum Library

Last scanned Jul 27, 2026, 8:44 AM · 2 views

75

Overall score

Fair

Summary

This website uses Nginx hosted on SUNET - Vetenskapsradet / SUNET, EU. SEO is fair (55/100) and accessibility is good (85/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

Sweden
Hosted on SUNET - Vetenskapsradet / SUNET, EU

Top issues to fix

11 issues found · 5 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • 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 viewport meta tag

    Accessibility

    Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

+5 more issues — details in the sections below.

55

SEO

6 issue(s) found

100

Performance

257 ms

65

Security

HTTPS & header checks

85

Accessibility

2 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.

Meta tags

Title
The GNU MP Bignum Library
Description
Canonical
Language
en
Charset
UTF-8
Viewport
Robots meta
Manifest

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.

Nginx

Hosting & CDN

CDN provider
—
IP address
130.242.124.102
ASN
AS1653 (SUNET - Vetenskapsradet / SUNET, EU)

DNS records

TypeValue
A
  • 130.242.124.102
AAAA—
MX
  • smtp.gmplib.org
TXT—
NS
  • ns.adb-centralen.se
  • ns.gmplib.org
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
gmplib.org
Valid from
Jul 15, 2026
Valid to
Oct 13, 2026
Days until expiry
77
SAN domains
gmplib.org, www.gmplib.org

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 9

Links

34 internal · 10 external · 0 broken

Images

1 total · 0 missing alt

Scripts / Styles

0 scripts · 1 stylesheets

JS / CSS size

0 B · 1.5 KB

Page size

20.3 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
11
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
  • Missing viewport meta tag

Scan details

Requested URL
https://gmplib.org
Final URL
https://gmplib.org
HTTP status
200
HTTP version
HTTP/2
Response time
257 ms
HTML size
20.3 KB
Redirect chain
https://gmplib.org

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does gmplib.org use?
gmplib.org is built with Nginx.
Is gmplib.org secure (HTTPS)?
Yes. gmplib.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 13, 2026.
Who hosts gmplib.org?
gmplib.org is hosted on SUNET - Vetenskapsradet / SUNET, EU.
What is gmplib.org's SEO score?
gmplib.org scored 55/100 for SEO in the latest analysis (fair).
What is gmplib.org's overall website score?
gmplib.org has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.