indexo.dev

zdrahal.eu

.eu crawl

First seen 2026-06-01 · Last seen 2026-06-01 · ok HTTP/1.1 200 761 ms crawled 2026-06-01

CZ · 82.208.44.40 · AS15685 CASABLANCA INT a.s.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Jan Zdráhal | Systems Architect | Deterministic Systems & AI Infrastructure
Description
Systems Architect specializing in deterministic systems and AI infrastructure. Author of the NS-L6 Standard, Deterministic System Specification, and Storage Specification.
Language
en
Canonical
https://www.zdrahal.eu

Open Graph

url
https://www.zdrahal.eu
title
Jan Zdráhal | Systems Architect | Deterministic Systems & AI Infrastructure
site name
Jan Zdráhal
description
Author of the NS-L6 Standard, Deterministic System Specification, and Storage Specification. Systems Architect focused on deterministic systems and AI infrastructure.

Technology

Server
Apache
PHP
5.6.40 end of life

Third-party hosts loaded (1)

  • orcid.org×1

Social

Contact

Email

DNS records live

NS
  • ns.forpsi.cz
  • ns.forpsi.it
  • ns.forpsi.net
  • ns.forpsi.us
MX
  • 0 mail2.intercore.cz
TXT
  • v=1;origin=deterministic-ledger;sep=59;fmt=id;hash;sha3=256
  • 1580bdbfff85d9c564765c36456b6dbf0bff1435dd4ba16f08d8518ef264543b
  • v=1;origin=deterministic-ledger;sep=59;fmt=dl-record;hash;sha3=256
Verified for
  • Google

Email authentication weak

SPF
v=spf1 +mx ip4:82.208.44.0/26 ip4:82.208.47.32/27 ip6:2001:1528:148::44:41 ~all
softfail (~all)
DMARC
not published
DKIM
  • default: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCZnc6BXEOwvcaURMndgg9718/FpX7ehXcjD6priUDETBPjMglO6CzMs75zo3eVPc5zola0XPCOpcwWDq3R04…
selectors probed

Certificate (current)

R12
from 2026-04-21 to 2026-07-20
Expires in 47 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.zdrahal.eu/

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

Links to (8)

Linked from (1)