indexo.dev

czech-instruktor.cz

.cz crawl

First seen 2026-05-28 · Last seen 2026-05-28 · ok HTTP/1.1 200 258 ms crawled 2026-05-30

CZ · 77.240.188.210 · AS24641 FASTER CZ spol. s r.o.

Reputation 62/100 wrong cert weak security headers no dmarc policy

Classifying

Technology

Server
Apache
PHP
5.5.33 end of life

DNS records live

NS
  • ns1.aerohosting.cz
  • ns2.aerohosting.net
  • ns3.aerohosting.eu
MX
  • 20 mx.aerohosting.cz
  • 50 mx2.aerohosting.cz

Email authentication weak

SPF
v=spf1 include:spf.aerohosting.cz -all
strict (-all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current) wrong cert

web
from 2025-09-22 to 2035-09-20
Expires in 3399 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 35/100 Checked over plain HTTP: http://czech-instruktor.cz/

present
  • strict-transport-security
findings
  • checked over plain HTTP
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=16000000

Linked from (1)