strezina.cz

.cz crawl

First seen 2026-06-03 · Last seen 2026-06-03 · ok HTTP/1.1 200 1167 ms crawled 2026-06-03

CZ · 77.93.207.13 · AS24971 MasterDC s.r.o.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title: Základní umělecká škola STŘEZINA | ZUŠ Střezina
Description: ZUŠ Střezina - Úvod
Language: cs
Canonical: https://www.strezina.cz/

Technology

Server: Apache
Stack: PHP

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (2)

fonts.googleapis.com×1
www.googletagmanager.com×1

Social

DNS records live

NS

ns1.pry.cz
ns2.pry.cz

MX

Show 7 MX records

10 aspmx.l.google.com
20 alt1.aspmx.l.google.com
20 alt2.aspmx.l.google.com
30 aspmx2.googlemail.com
30 aspmx3.googlemail.com
30 aspmx4.googlemail.com
30 aspmx5.googlemail.com

Email authentication weak

SPF: not published
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

R13

from 2026-05-06 to 2026-08-04

Expires in 61 days

Full certificate history on crt.sh ↗

HTTP security headers

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

findings

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

Links to (3)

Linked from (1)

udrzse.cz×1