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circl.lu

CIRCL » CIRCL -- Computer Incident Response Center Luxembourg -- CSIRT -- CERT

Last scanned Aug 3, 2026, 5:00 AM · 8 views

87

Overall score

Great

Summary

The Computer Incident Response Center Luxembourg (CIRCL) is a government-driven initiative designed to gather, review, report and respond to computer security threats and incidents. This website uses Apache. SEO is fair (55/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.

The Computer Incident Response Center Luxembourg (CIRCL) is a government-driven initiative designed to gather, review, report and respond to computer security threats and incidents. CIRCL is the CERT (Computer Emergency Response Team/Computer Security Incident Response Team) for the private sector, communes and non-governmental entities in Luxembourg.

Top issues to fix

9 issues found

  • Title longer than 60 characters

    SEO

    Shorten the title to under 60 characters so search results don't truncate it.

  • Meta description longer than 160 characters

    SEO

    Trim the meta description to under 160 characters to avoid truncation in search results.

  • Missing canonical link

    SEO

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

  • Multiple H1 headings found

    SEO

    Keep a single H1 per page and demote the others to H2/H3.

  • 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.

+3 more issues — details in the sections below.

55

SEO

8 issue(s) found

100

Performance

122 ms

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-1 overall since Jul 26, 2026

Overall
87
SEO
55
Security
100
Performance
100
Accessibility
100

Organization

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

The Computer Incident Response Center Luxembourg (CIRCL) is a government-driven initiative designed to gather, review, report and respond to computer security threats and incidents. CIRCL is the CERT (Computer Emergency Response Team/Computer Security Incident Response Team) for the private sector, communes and non-governmental entities in Luxembourg.

X (Twitter)X (Twitter)X (Twitter)X (Twitter)GitHub

Meta tags

Title
CIRCL » CIRCL -- Computer Incident Response Center Luxembourg -- CSIRT -- CERT
Description
The Computer Incident Response Center Luxembourg (CIRCL) is a government-driven initiative designed to gather, review, report and respond to computer security threats and incidents. CIRCL is the CERT (Computer Emergency Response Team/Computer Security Incident Response Team) for the private sector, communes and non-governmental entities in Luxembourg.
Canonical
Language
en
Charset
UTF-8
Viewport
width=device-width
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.

Apache

Hosting & CDN

Hosting provider
—
CDN provider
—
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.2
Issuer
DigiCert Inc
Subject
*.circl.lu
Valid from
Mar 20, 2026
Valid to
Oct 4, 2026
Days until expiry
62
SAN domains
*.circl.lu, circl.lu

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 2 · H2 0 · H3 4

Links

78 internal · 13 external · 20 broken

Images

5 total · 1 missing alt

Scripts / Styles

0 scripts · 2 stylesheets

JS / CSS size

0 B · 0 B

Page size

18.4 KB

Robots.txt & Sitemap

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

SEO issues

  • Title longer than 60 characters
  • Meta description longer than 160 characters
  • Missing canonical link
  • Multiple H1 headings found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://circl.lu
Final URL
https://circl.lu
HTTP status
200
HTTP version
HTTP/1.1
Response time
122 ms
HTML size
18.4 KB
Redirect chain
https://circl.lu

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Frequently asked questions

What technology does circl.lu use?
circl.lu is built with Apache.
Is circl.lu secure (HTTPS)?
Yes. circl.lu uses TLS 1.2 with a certificate issued by DigiCert Inc, valid until Oct 4, 2026.
Who hosts circl.lu?
Hosting provider information for circl.lu is not available yet.
What is circl.lu's SEO score?
circl.lu scored 55/100 for SEO in the latest analysis (fair).
What is circl.lu's overall website score?
circl.lu has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.
Has circl.lu's score changed over time?
circl.lu's overall score has declined by 1 point (from 88 to 87) since Jul 26, 2026.