What technology does crux.nu use?

crux.nu is built with PHP, Nginx.

Is crux.nu secure (HTTPS)?

Yes. crux.nu uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 12, 2026.

crux.nu is hosted on GlobalConnect-AS12552 - GlobalConnect AB, SE.

What is crux.nu's SEO score?

crux.nu scored 55/100 for SEO in the latest analysis (fair).

What is crux.nu's overall website score?

crux.nu has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.

crux.nu

CRUX | Main / HomePage

Last scanned Aug 24, 2026, 1:23 PM

Overall score

Fair

Summary

This website uses PHP hosted on GlobalConnect-AS12552 - GlobalConnect AB, SE. SEO is fair (55/100) and accessibility is good (75/100). Security scores good (85/100) and performance excellent (100/100). Top issue: Missing meta description.

Sweden

Hosted on GlobalConnect-AS12552 - GlobalConnect AB, SE

Top issues to fix

11 issues found · 4 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
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.
1 cookie without Secure/HttpOnly flags
Security
Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

+5 more issues — details in the sections below.

SEO

6 issue(s) found

100

Performance

154 ms

Security

HTTPS & header checks

Accessibility

3 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.

Technologies

Detected frameworks, languages, and tools.

PHP Nginx

Hosting & CDN

Hosting provider: GlobalConnect-AS12552 - GlobalConnect AB, SE
CDN provider: —
IP address: 213.132.101.140
ASN: AS12552 (GlobalConnect-AS12552 - GlobalConnect AB, SE)

DNS records

Type	Value
A	213.132.101.140
AAAA	—
MX	crux.nu
TXT	v=spf1 +a +mx +ip4:213.132.101.140 ~all
NS	ns9.dnsnoc.net ns10.dnsnoc.net
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: crux.nu
Valid from: Jul 14, 2026
Valid to: Oct 12, 2026
Days until expiry: 48
SAN domains: crux.nu, git.crux.nu, grafana.crux.nu, idb.crux.nu, lists.crux-arm.nu, lists.crux.nu, www.crux.nu

Security headers

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

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 0 · H2 3 · H3 0

Links

20 internal · 12 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

2 scripts · 2 stylesheets

JS / CSS size

49.4 KB · 20.3 KB

Page size

6.3 KB

Robots.txt & Sitemap

robots.txt: Found
Disallow rules: 2
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

Scan details

Requested URL: https://crux.nu
Final URL: https://crux.nu
HTTP status: 200
HTTP version: HTTP/2
Response time: 154 ms
HTML size: 6.3 KB
Redirect chain: https://crux.nu

See something wrong on this report? Request a correction

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