common-lisp.net

Welcome to Common-Lisp.net!

Last scanned Aug 3, 2026, 10:00 PM · 9 views

73

Overall score

Fair

Summary

This website uses Apache hosted on HETZNER-AS - Hetzner Online GmbH, DE. SEO is fair (60/100) and accessibility is fair (70/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

Germany

Hosted on HETZNER-AS - Hetzner Online GmbH, DE

Top issues to fix

12 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 Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
Over half of images are missing alt text
Accessibility
Add alt attributes to images — screen readers depend on them, and they help image SEO.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

+6 more issues — details in the sections below.

60

SEO

6 issue(s) found

100

Performance

149 ms

65

Security

HTTPS & header checks

70

Accessibility

1 issue(s) found

Score history

0 overall since Jul 26, 2026

Overall: 73
SEO: 60
Security: 65
Performance: 100
Accessibility: 70

Meta tags

Title: Welcome to Common-Lisp.net!
Description
Canonical
Language: en
Charset: UTF-8
Viewport: width=device-width,initial-scale=1,shrink-to-fit=no
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Hosting & CDN

Hosting provider: HETZNER-AS - Hetzner Online GmbH, DE
CDN provider: —
IP address: 65.108.13.229
ASN: AS24940 (HETZNER-AS - Hetzner Online GmbH, DE)

DNS records

Type	Value
A	65.108.13.229
AAAA	2a01:4f9:6a:4991::2
MX	mail.common-lisp.net
TXT	google-site-verification=Fp7yUN0MYL2t-PdsaApYYjp3xO_b71SmVdA8pwneZ3A v=spf1 mx a:common-lisp.net ip4:148.251.248.130 ip4:144.76.188.67 -all google-site-verification=Rt036I49zxdomcjL0wTzJh2_iGUvlMGdoW0em_g9XdI
NS	ns-159-b.gandi.net ns-177-c.gandi.net ns-222-a.gandi.net
CAA	—
CNAME	—
IPv6 support	Yes

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: future.common-lisp.net
Valid from: Jul 16, 2026
Valid to: Oct 14, 2026
Days until expiry: 71
SAN domains: cl-foundation.com, cl-foundation.org, cl.foundation, common-lisp.foundation, common-lisp.net, containers.common-lisp.net, future.common-lisp.net, git.common-lisp.net, gitlab.common-lisp.net, lisppaste.common-lisp.net, mailman.common-lisp.net, mailman3.common-lisp.net, meet.common-lisp.net, paste.lisp.org, quickref.common-lisp.net, svn.common-lisp.net, trac.common-lisp.net, www.cl-foundation.com, www.cl-foundation.org, www.cl.foundation, www.common-lisp.foundation, www.common-lisp.net

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 7 · H3 1

Links

18 internal · 15 external · 1 broken

Images

3 total · 2 missing alt

Scripts / Styles

5 scripts · 4 stylesheets

JS / CSS size

339 KB · 203 KB

Page size

16.6 KB

Robots.txt & Sitemap

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

SEO issues

Missing meta description
Missing canonical link
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://common-lisp.net
Final URL: https://common-lisp.net
HTTP status: 200
HTTP version: HTTP/2
Response time: 149 ms
HTML size: 16.6 KB
Redirect chain: https://common-lisp.net

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does common-lisp.net use?: common-lisp.net is built with jQuery, Apache.
Is common-lisp.net secure (HTTPS)?: Yes. common-lisp.net uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 14, 2026.
Who hosts common-lisp.net?: common-lisp.net is hosted on HETZNER-AS - Hetzner Online GmbH, DE.
What is common-lisp.net's SEO score?: common-lisp.net scored 60/100 for SEO in the latest analysis (fair).
What is common-lisp.net's overall website score?: common-lisp.net has an overall SiteGraph score of 73/100, combining SEO, performance, security, and accessibility.
Has common-lisp.net's score changed over time?: common-lisp.net's overall score has stayed steady at 73/100 since Jul 26, 2026.