indexo.dev

clexpert.cz

.cz crawl

First seen 2026-06-01 · Last seen 2026-06-02 · ok HTTP/1.1 200 811 ms crawled 2026-06-02

IE · 13.69.228.19 · AS8075 Microsoft Corporation

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
Petr Zahradník Computer Laboratory
Description
Petr Zahradník, Computer Laboratory, software, hardware, vývoj software na zakázku, komponenty pro vývojáře, elektronika, převodníky USB, RS232, RS485, účetní programy, 3D tiskárny a příslušenství, plast pro 3D tisk, stavebnice.
Language
cs

Technology

Server
Microsoft-IIS
ASP.NET
4.0.30319
jQuery
3.7.1
Stack
ASP.NET

Social

Contact

Phone
Address
Petr Zahradník Computer LaboratoryObvodová 740/14400 07 Ústí nad Labem602 409 601 - mobil

DNS records live

NS
  • ns1.regzone.cz
  • ns1.regzone.de
  • ns1.regzone.info
MX
  • 300 clexpert-cz.mail.protection.outlook.com
TXT
  • _ccae06y7kuf54hwq1wn6u0hvd2o96g6
  • _sd1kuh8yb9iau0t83cw62psjhgitgql
Verified for
  • Google
  • Microsoft 365

Email authentication partial

SPF
v=spf1 a mx a:ham.zoner.com a:clsrv.clexpert.cz include:spf.protection.outlook.com include:sendgrid.net include:sendgrid.clexpert.cz include:u773590.wl091.sendgrid.net include:mxsspf.sendpulse.com include:mxsmtp.sendpulse.com include:servers.mcsv.net ip4:217.198.112.0/20 ip4:72.32.20.57 ip4:198.101.161.84 ip4:64.74.103.0/24 ip4:63.251.34.0/24 ip4:72.32.5.0/24 ip4:72.32.159.0/24 ip4:72.32.14.0/24 ip4:72.32.167.0/24 ip4:174.143.114.0/24 -all
strict (-all) · 11 DNS lookups (RFC limit is 10)
DMARC
v=DMARC1; p=none
policy: none (monitoring only)
DKIM
Show 6 DKIM selectors
  • selector2: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDabPN9JS0uM/c6P0OOWNW6GmS5j2LDnHBrNPlaSZdpunajDf3X8rK/lfl8PPWfjTG/jzzroy2UhiqVLNSJXx…
  • k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…
  • mail: v=DKIM1; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArWCifGzchop6GXxgkNv2E9mj5Yh39LpEErL8xmdw1bLC8CyMpzOkNledjb8wY5s1ge06amHfLJlckDWwEkTTd…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq3H2WKGlciUT6Nwjdt8OSsylTJfDVZ2mK+zoAOKSyVRQ6bFIjrW6xE3GebUMh59rhPZmQ2wwtsTv2d9Y2L…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCnCKZorH4iXKPeearH6vslk+gt6NUW+1koHx0LCgV11dXLMPY5QYh1xIln1gsFLnXzwvrZKTX2BZP7qLvDFNw6Md…
  • smtpapi: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDPtW5iwpXVPiH5FzJ7Nrl8USzuY9zqqzjE0D1r04xDN6qwziDnmgcFNNfMewVKN2D1O+2J9N14hRprzByFwfQW76…
selectors probed

Certificate (current)

GoGetSSL G2 TLS RSA4096 SHA256 2022 CA-1
from 2026-04-20 to 2026-11-05
Expires in 155 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Links to (6)

Linked from (1)