indexo.dev

vzhurudolu.cz

.cz crawl

First seen 2026-05-11 · Last seen 2026-05-17 · ok HTTP/1.1 200 10590 ms crawled 2026-05-17

US · 104.21.85.199 · AS13335 Cloudflare, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Vzhůru dolů – webová kodéřina ze všech stran
Description
HTML5, CSS3, responzivní design v textech a na školeních Martina Michálka.
Language
cs
Translations
  • en
Feeds

Open Graph

url
https://www.vzhurudolu.cz/
title
Vzhůru dolů – webová kodéřina ze všech stran
site name
Vzhůru dolů
description
HTML5, CSS3, responzivní design v textech a na školeních Martina Michálka.

Technology

CDN
Cloudflare
Analytics
  • Cloudflare Insights

Third-party hosts loaded (2)

  • static.cloudflareinsights.com×1
  • www.cssmine.com×1

Social

DNS records live

NS
  • jim.ns.cloudflare.com
  • tegan.ns.cloudflare.com
MX
  • 10 mx1.savana.cz
  • 20 mx2.savana.cz
Verified for
  • Google

Email authentication weak

SPF
v=spf1 include:_spf.savana.cz include:_spf.google.com mx ip4:217.16.187.41/24 ip4:217.16.187.42/24 ip4:217.16.187.43/24 ip4:217.16.187.44/24 ip4:217.16.187.45/24 include:spf.mandrillapp.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-05-15 to 2026-08-13
Expires in 85 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.vzhurudolu.cz/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (6)

Linked from (2)