sernet.de
Sichere Infrastrukturen & Informationssicherheit | SerNet
Last scanned Jul 26, 2026, 5:47 AM
Overall score
Excellent
Summary
SerNet ist Dienstleisterin für Informationssicherheit. This website uses Apache. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
SerNet ist Dienstleisterin für Informationssicherheit. Bei uns finden Sie Produkte und Services rund um sichere IT – wirtschaftlich und rechtssicher betrieben.
Top issues to fix
6 issues found
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
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.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
5 issue(s) found
Performance
453 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
SerNet ist Dienstleisterin für Informationssicherheit. Bei uns finden Sie Produkte und Services rund um sichere IT – wirtschaftlich und rechtssicher betrieben.
Contact
Email, phone, and address published on this site's own pages.
- Phone
- +495513700000
Meta tags
- Title
- Sichere Infrastrukturen & Informationssicherheit | SerNet
- Description
- SerNet ist Dienstleisterin für Informationssicherheit. Bei uns finden Sie Produkte und Services rund um sichere IT – wirtschaftlich und rechtssicher betrieben.
- Canonical
- https://www.sernet.de/
- Language
- de
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- index,follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- sernet.de
- Valid from
- Jun 14, 2026
- Valid to
- Sep 12, 2026
- Days until expiry
- 45
- SAN domains
- sernet.de, www.sernet.de
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 2 · H2 0 · H3 2
Links
140 internal · 5 external · 20 broken
Images
35 total · 0 missing alt
Scripts / Styles
5 scripts · 3 stylesheets
JS / CSS size
628 B · 49 B
Page size
181 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Multiple H1 headings found
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://sernet.de
- Final URL
- https://www.sernet.de/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 450 ms
- HTML size
- 181 KB
- Redirect chain
- https://sernet.de → https://www.sernet.de/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does sernet.de use?
- sernet.de is built with Apache.
- Is sernet.de secure (HTTPS)?
- Yes. sernet.de uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 12, 2026.
- Who hosts sernet.de?
- Hosting provider information for sernet.de is not available yet.
- What is sernet.de's SEO score?
- sernet.de scored 70/100 for SEO in the latest analysis (fair).
- What is sernet.de's overall website score?
- sernet.de has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card