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common-lisp.net

Welcome to Common-Lisp.net!

Last scanned Jul 26, 2026, 3:19 PM

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

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

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

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.

jQueryApache

Hosting & CDN

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

DNS records

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

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
79
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 0

Links

18 internal · 7 external · 2 broken

Images

3 total · 2 missing alt

Scripts / Styles

6 scripts · 4 stylesheets

JS / CSS size

155 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

Accessibility issues

  • Over half of images are missing alt text

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.