indexo.dev

hackerschool.org

.org crawl

First seen 2026-05-27 · Last seen 2026-05-27 · ok HTTP/1.1 200 2484 ms crawled 2026-05-30

KR · 54.180.177.131 · AS16509 Amazon.com, Inc.

Reputation 62/100 wrong cert weak security headers no dmarc policy

Classifying

Technology

Server
Apache
PHP
5.3.3 end of life

Registration

Registrar
Inames Co., Ltd.
Created
2000-08-09
Expires
2030-08-09 1530 days left
Updated
2022-12-29
Name servers
  • ns4.hackerschool.org
  • ns5.hackerschool.org

DNS records live

NS
  • ns.hackerschool.org
MX
  • 10 ns.hackerschool.org

Email authentication weak

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current) wrong cert

R13
from 2026-04-01 to 2026-06-30
Expires in 29 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Linked from (1)