indexo.dev

jsi.cz

.cz crawl

First seen 2026-05-27 · Last seen 2026-05-30 · ok HTTP/1.1 200 2711 ms crawled 2026-05-30

CZ · 81.2.194.244 · AS24806 INTERNET CZ, a.s.

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
Jednota školských informatiků | JSI.CZ
Language
cs
Generator
Divi v.4.27.6
Canonical
https://jsi.cz/
Feeds

Technology

Server
aruba-proxy
CMS
WordPress
jQuery
3.7.1
Fonts
  • Google Fonts

Third-party hosts loaded (1)

  • fonts.googleapis.com×2

Social

Contact

Email
Phone

Registration

Registrar
REG-INTERNET-CZ
Created
2002-08-08
Expires
2028-08-06 797 days left
Updated
2020-06-05
Name servers
  • ns.forpsi.cz
  • ns.forpsi.it
  • ns.forpsi.net

DNS records live

NS
  • ns.forpsi.cz
  • ns.forpsi.it
  • ns.forpsi.net
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 partial

SPF
v=spf1 include:_spf.google.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none; rua=mailto:postmaster@jsi.cz, mailto:dmarc@jsi.cz; pct=100; adkim=s; aspf=s.
policy: none (monitoring only)
DKIM
  • google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4F8hpdHO3kW2X/gpdq4GOn/VymXNqcx25/DzPXr+a+k2HfclAOehqLhgGDQRJg/wnFw1/I1ertsao9…
selectors probed

Certificate (current)

Actalis Domain Validation Server CA G3
from 2025-07-18 to 2026-08-09
Expires in 70 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Links to (10)

Linked from (3)