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.

Hosting provider information for sernet.de is not available yet.

What is sernet.de's SEO score?

sernet.de scored 80/100 for SEO in the latest analysis (great).

What is sernet.de's overall website score?

sernet.de has an overall SiteGraph score of 94/100, combining SEO, performance, security, and accessibility.

Has sernet.de's score changed over time?

sernet.de's overall score has improved by 3 points (from 91 to 94) since Jul 26, 2026.

sernet.de

Sichere Infrastrukturen & Informationssicherheit | SerNet

Last scanned Aug 5, 2026, 10:00 PM · 14 views

Overall score

Excellent

Summary

SerNet ist Dienstleisterin für Informationssicherheit. This website uses Apache. SEO is good (80/100) 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.

Germany

Top issues to fix

3 issues found

Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
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.

SEO

3 issue(s) found

100

Performance

449 ms

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

+3 overall since Jul 26, 2026

Overall: 94
SEO: 80
Security: 100
Performance: 100
Accessibility: 100

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.

Email: datenschutz@sernet.de
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.

Apache

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: 185.199.218.8
ASN: AS41955 ()

DNS records

Type	Value
A	185.199.218.8
AAAA	2a0a:a3c0:0:d2e8::1
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	Yes

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: 37
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 · 6 external · 0 broken

Images

35 total · 0 missing alt

Scripts / Styles

6 scripts · 3 stylesheets

JS / CSS size

437 KB · 261 KB

Page size

181 KB

Robots.txt & Sitemap

robots.txt: Found
Disallow rules: 2
sitemap.xml: Found
URLs in sitemap: -1

SEO issues

Meta description longer than 160 characters
Multiple H1 headings found
No structured data (JSON-LD) found

Scan details

Requested URL: https://sernet.de
Final URL: https://www.sernet.de/
HTTP status: 200
HTTP version: HTTP/2
Response time: 446 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 80/100 for SEO in the latest analysis (great).
What is sernet.de's overall website score?: sernet.de has an overall SiteGraph score of 94/100, combining SEO, performance, security, and accessibility.
Has sernet.de's score changed over time?: sernet.de's overall score has improved by 3 points (from 91 to 94) since Jul 26, 2026.