linuxdays.cz

.cz crawl

First seen 2026-06-01 · Last seen 2026-06-01 · ok HTTP/1.1 200 457 ms crawled 2026-06-01

CZ · 37.205.10.200 · AS24971 MasterDC s.r.o.

Reputation 92/100 no dmarc policy

sector tech type homepage

HTML metadata

Title: LinuxDays: linuxové dny od lidí pro lidi | LinuxDays
Description: Konference o Linuxu, open-source a vším, co s tím souvisí. Koná se každoročně v pražských Dejvicíc na půdě FIT ČVUT v Praze.
Language: cs
Generator: Bash
Canonical: index.html

Open Graph

title: LinuxDays: linuxové dny od lidí pro lidi | LinuxDays
description: Konference o Linuxu, open-source a vším, co s tím souvisí. Koná se každoročně v pražských Dejvicíc na půdě FIT ČVUT v Praze.

Technology

Server: nginx
jQuery: 3.2.1 known XSS (<3.5)

Third-party hosts loaded (1)

ajax.googleapis.com×2

Social

DNS records live

NS

flexi.oskarcz.net
ns1.petrkrcmar.cz
ns2.petrkrcmar.cz

MX

10 ag1.cesnet.cz
10 ag2.cesnet.cz

Email authentication weak

SPF: v=spf1 a:www.linuxdays.cz ~all
softfail (~all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

R12

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

Expires in 64 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 95/100 Checked live page: https://www.linuxdays.cz/2026/

present

strict-transport-security
content-security-policy
x-frame-options
x-content-type-options
referrer-policy
permissions-policy

findings

CSP allows unsafe inline scripts/styles

Header values

referrer-policy: origin-when-cross-origin
x-frame-options: SAMEORIGIN
permissions-policy: accelerometer=(), camera=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), midi=(), payment=(), usb=()
x-content-type-options: nosniff
content-security-policy: default-src https: data: 'unsafe-inline' 'unsafe-eval'; upgrade-insecure-requests
strict-transport-security: max-age=31536000; includeSubDomains; preload

Links to (20)

Linked from (1)

navratil.cz×1