indexo.dev

clavius.cz

.cz dns

First seen 2026-05-30 · Last seen 2026-05-30 · ok HTTP/1.1 200 424 ms crawled 2026-05-31

CZ · 81.2.194.180 · AS24806 INTERNET CZ, a.s.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Knihovní systémy Clavius a LANius
Language
cs

Technology

Server
Microsoft-IIS

DNS records live

NS
  • ns.forpsi.cz
  • ns.forpsi.it
  • ns.forpsi.net
MX
  • 10 knihovny.net
Verified for
  • Google

Email authentication strong

SPF
v=spf1 ip4:31.30.125.177 ip4:217.75.216.74 ip4:77.240.190.155 -all
strict (-all)
DMARC
v=DMARC1; p=quarantine; sp=quarantine;
policy: quarantine · sp=quarantine
DKIM
no key found at common selectors

Certificate (current)

Actalis Domain Validation Server CA G3
from 2025-07-25 to 2026-08-15
Expires in 74 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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