indexo.dev

knot-dns.cz

.cz crawl

First seen 2026-05-15 · Last seen 2026-05-19 · ok HTTP/1.1 200 1603 ms crawled 2026-05-19

CZ · 217.31.204.96 · AS25192 CZ.NIC, z.s.p.o.

Reputation 100/100

Classifying

HTML metadata

Title
Knot DNS
Description
High-performance authoritative DNS server
Language
en

Technology

Server
nginx

Third-party hosts loaded (2)

  • piwik.nic.cz×1
  • websites.pages.labs.nic.cz×1

Social

Registration

Registrar
REG-CZNIC
Created
2011-05-24
Expires
2030-05-23 1463 days left
Updated
2024-12-03
Name servers
  • sld1.ns.nic.cz
  • sld2.ns.nic.cz
  • sld3.ns.nic.cz

DNS records live

NS
  • sld1.ns.nic.cz
  • sld2.ns.nic.cz
  • sld3.ns.nic.cz
MX
  • 10 mail.nic.cz
  • 15 mx.nic.cz

Email authentication strong

SPF
v=spf1 include:_v4nets.nic.cz include:_v6nets.nic.cz ~all
softfail (~all)
DMARC
v=DMARC1; p=reject; pct=100; rua=mailto:dmarc.reports@nic.cz; ruf=mailto:dmarc.reports@nic.cz; fo=1; aspf=r; adkim=r; rf=afrf; ri=86400; sp=reject
policy: reject (enforced) · sp=reject
DKIM
no key found at common selectors

Certificate (current)

E8
from 2026-05-14 to 2026-08-12
Expires in 84 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 90/100 Checked live page: https://www.knot-dns.cz/

present
  • strict-transport-security
  • content-security-policy
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • CSP allows unsafe inline scripts/styles
  • missing Permissions Policy
Header values
referrer-policy
origin
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
content-security-policy
default-src 'self' http: https: data: blob: 'unsafe-inline' 'unsafe-eval'; upgrade-insecure-requests;
strict-transport-security
max-age=63072000; includeSubDomains; preload, max-age=31536000; includeSubDomains; preload

Links to (7)

Linked from (1)