indexo.dev

duelonline.cz

.cz crawl

First seen 2026-05-28 · Last seen 2026-05-31 · ok HTTP/1.1 200 1525 ms crawled 2026-05-31

CZ · 178.238.46.49 · AS24971 MasterDC s.r.o.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Účetnictví online | DuelOnline
Description
Moderní účetnictví online. Ekonomický systém DUEL Účetnictví, Daňová evidence, Mzdy, Sklady, Malobchodní prodej, Majetek, Kancelář, E-Shop
Language
en

Technology

Server
Apache
jQuery
1.6.1 known XSS (<3.5)
Stack
PHP

Contact

Email
Phone

DNS records live

NS
  • ns.aceit.cz
  • ns2.aceit.cz
  • ns3.aceit.cz
MX
  • 10 semail02.aceit.cz
TXT
  • v=DMARC1; p=none; rua=mailto:volse@aceit.cz; ruf=mailto:volse@aceit.cz; fo=1

Email authentication weak

SPF
v=spf1 mx a a:mail5.aceit.cz a:mail6.aceit.cz a:semail01.aceit.cz ~all
softfail (~all)
DMARC
not published
DKIM
  • mail: v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDygRlnAjiShFEJnmRl/ppUiXhV7GmC9OCCY9668LQEXiEDoYpZ8IpJaTS2mZucjAZd9mNMYvJ/tkVv6…
selectors probed

Certificate (current)

R13
from 2026-04-21 to 2026-07-20
Expires in 49 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Links to (9)

Linked from (1)