indexo.dev

reactiveprinciples.org

.org crawl

First seen 2026-04-11 · Last seen 2026-05-18 · ok HTTP/1.1 200 982 ms crawled 2026-05-18

US · 185.199.110.153 · AS54113 Fastly, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
The Reactive Principles :: The Reactive Principles
Language
en
Generator
Antora 2.3.4
Canonical
https://www.reactivepriciples.org/index.html

Technology

CDN
Fastly
Server
GitHub.com
Cookie consent
  • OneTrust
Fonts
  • Google Fonts

Third-party hosts loaded (4)

  • fonts.googleapis.com×2
  • cdn.cookielaw.org×1
  • fonts.gstatic.com×1
  • www.reactivepriciples.org×1

Registration

Registrar
Gandi SAS
Created
2020-04-16
Expires
2027-04-16 331 days left
Updated
2026-02-20
Name servers
  • ns-175-b.gandi.net
  • ns-203-c.gandi.net
  • ns-37-a.gandi.net

DNS records live

NS
  • ns-175-b.gandi.net
  • ns-203-c.gandi.net
  • ns-37-a.gandi.net
MX
  • 10 spool.mail.gandi.net
  • 50 fb.mail.gandi.net

Email authentication weak

SPF
v=spf1 a mx -all
strict (-all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-04-21 to 2026-07-20
Expires in 61 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Links to (1)

Linked from (3)