petru.cz

.cz crawl

First seen 2026-06-01 · Last seen 2026-06-02 · ok HTTP/1.1 200 658 ms crawled 2026-06-02

CZ · 91.239.202.42 · AS60606 PRO-ZETA a.s.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: Úvod — Petrů
Language: cs
Canonical: https://www.petru.cz

Open Graph

url: https://www.petru.cz
title: Úvod
locale: cs_CZ

Technology

Server: Apache
PHP: 7.4.33 end of life

Analytics

Google Tag Manager

Fonts

Adobe Fonts

Third-party hosts loaded (2)

use.typekit.net×1
www.googletagmanager.com×1

DNS records live

NS

ns1.thinline.cz
ns2.thinline.cz
ns3.cesky-hosting.eu

MX

10 aspmx.l.google.com
20 alt1.aspmx.l.google.com
30 alt2.aspmx.l.google.com
40 aspmx2.googlemail.com
50 aspmx3.googlemail.com

Verified for

Google

Email authentication strong

SPF

v=spf1 a mx include:_spf.google.com ~all

softfail (~all)

DMARC

v=DMARC1; p=reject; ruf=mailto:petru@dinaz.cz; pct=100; fo=1

policy: reject (enforced)

DKIM

google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCN63y5PDqXccTba1Of+XhG0Ne4I4UG5IJAb27txccq+KzMerDG7j1eXUgGoEaPO8sHhqWwgUi7Oh1XaOsicS…

selectors probed

Certificate (current)

R12

from 2026-03-27 to 2026-06-25

Expires in 20 days

Full certificate history on crt.sh ↗

HTTP security headers

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

findings

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

Linked from (2)

sdhjaroslavice.cz×1
zsgm.cz×1