circl.lu
CIRCL » CIRCL -- Computer Incident Response Center Luxembourg -- CSIRT -- CERT
Last scanned Jul 26, 2026, 5:18 AM
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 hosted on CIRCL - Luxembourg House of Cybersecurity, LU. SEO is fair (60/100) 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.
- LU
- Hosted on CIRCL - Luxembourg House of Cybersecurity, LU
Top issues to fix
7 issues found
Title longer than 60 characters
SEOShorten the title to under 60 characters so search results don't truncate it.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
+1 more issue — details in the sections below.
SEO
7 issue(s) found
Performance
149 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
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.
Contact
Email, phone, and address published on this site's own pages.
- info@circl.lu
Source: https://circl.lu/contact/
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
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- CIRCL - Luxembourg House of Cybersecurity, LU
- CDN provider
- —
- IP address
- 185.194.93.14
- ASN
- AS197869 (CIRCL - Luxembourg House of Cybersecurity, LU)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX |
|
| TXT |
|
| NS |
|
| CAA |
|
| CNAME | — |
| IPv6 support | Yes |
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
- 70
- 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 · 0 broken
Images
5 total · 1 missing alt
Scripts / Styles
0 scripts · 2 stylesheets
JS / CSS size
0 B · 46.7 KB
Page size
18.4 KB
Robots.txt & Sitemap
- robots.txt
- 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
- 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
- 149 ms
- HTML size
- 18.4 KB
- Redirect chain
- https://circl.lu
See something wrong on this report? Request a correction
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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?
- circl.lu is hosted on CIRCL - Luxembourg House of Cybersecurity, LU.
- What is circl.lu's SEO score?
- circl.lu scored 60/100 for SEO in the latest analysis (fair).
- What is circl.lu's overall website score?
- circl.lu has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card