indexo.dev

opentutorials.org

.org crawl

First seen 2026-04-25 · Last seen 2026-05-18 · ok HTTP/1.1 200 851 ms crawled 2026-05-18

US · 104.26.9.66 · AS13335 Cloudflare, Inc.

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
오픈튜토리얼스

Open Graph

title
opentutorials.org

Technology

CDN
Cloudflare
CMS
Gatsby
Analytics
  • Google Tag Manager

Third-party hosts loaded (2)

  • s3-ap-northeast-2.amazonaws.com×19
  • www.googletagmanager.com×1

Social

Registration

Registrar
Dotname Korea Corp.
Created
2011-01-20
Expires
2030-01-20 1340 days left
Updated
2026-01-31
Name servers
  • george.ns.cloudflare.com
  • violet.ns.cloudflare.com

DNS records live

NS
  • george.ns.cloudflare.com
  • violet.ns.cloudflare.com
MX
  • 1 aspmx.l.google.com
  • 10 aspmx2.googlemail.com
  • 10 aspmx3.googlemail.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
Verified for
  • Meta

Email authentication weak

SPF
not published
DMARC
v=DMARC1; p=none;
policy: none (monitoring only)
DKIM
  • google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDk5lfGXpsbSpJR/F5z6Ql0dwDOoBEBCt9p05/b0B1Ao7hpdo1PAzfyrEZjXuthG8ClrLxFQ0XWaC/uhe/8/0…
  • k1: k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDcTtns+xqJfZxMlgwOdVHNfstuVqEHadKe6XyaEbPicDExVpz587KzlktlgpFEbZErm6eKV/HuWRBjZjLzyopEjRNOGqR…
selectors probed

Certificate (current)

WE1
from 2026-03-31 to 2026-06-29
Expires in 39 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://opentutorials.org/

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

Links to (3)

Linked from (2)