felsenstein.org

.org crawl

First seen 2026-04-21 · Last seen 2026-05-18 · ok HTTP/1.1 200 8939 ms crawled 2026-05-15

DE · 212.223.26.38 · AS8741 ratiokontakt GmbH

Reputation 87/100 weak security headers no dmarc policy

sector other type homepage

HTML metadata

Title

Fritz-Felsenstein-Haus –

Language

Generator

WordPress 5.8.13

Canonical

https://www.felsenstein.org/wp/

Feeds

Technology

Server: nginx
CMS: WordPress

Third-party hosts loaded (1)

s.w.org×1

Social

Registration

Registrar

InterNetX GmbH

Created

1998-04-27

Expires

2027-04-26 341 days left

Updated

2026-04-26

Name servers

ns11.nameserver.de
ns12.nameserver.de

DNS records live

NS

ns11.nameserver.de
ns12.nameserver.de

MX

0 felsenstein-org.mail.protection.outlook.com

TXT

Show 5 TXT records

MS=ms46544787
apple-domain-verification=mngbzyVGazQAN39I
google-site-verification=knggAzR8Wrjaw3C84NzfBQIC35aHf73U33u2SlXC4jo
google-site-verification=o_0gDoYB0eE98zrTRWfL48lz2EEGJ1ZQHTYz8G5L1Eg
MS=3A8FD13CB753CC561D91C80601C0B4028F0C5ECF

Email authentication weak

SPF: v=spf1 a mx ip4:62.55.182.68 include:spf.protection.outlook.com -all
strict (-all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

Sectigo Public Server Authentication CA DV R36

from 2025-08-27 to 2026-09-05

Expires in 108 days

Full certificate history on crt.sh ↗

HTTP security headers

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

findings

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