indexo.dev

fungrim.org

.org crawl

First seen 2026-04-15 · Last seen 2026-05-07 · ok HTTP/1.1 200 616 ms crawled 2026-05-09

DE · 78.159.99.205 · AS28753 Leaseweb Deutschland GmbH

Reputation 89/100 weak security headers dmarc monitor-only

sector tech type homepage

HTML metadata

Title
Fungrim: The Mathematical Functions Grimoire

Technology

Server
nginx
Fonts
  • Google Fonts

Third-party hosts loaded (2)

  • cdn.jsdelivr.net×1
  • fonts.googleapis.com×1

Social

Registration

Registrar
Squarespace Domains II LLC
Created
2019-03-14
Expires
2027-03-14 298 days left
Updated
2026-03-04
Name servers
  • ns1.de.opalstack.com
  • ns1.us.opalstack.com
  • ns2.de.opalstack.com
  • ns2.us.opalstack.com
  • ns3.de.opalstack.com
  • ns3.us.opalstack.com

DNS records live

NS
  • ns1.us.opalstack.com
  • ns2.us.opalstack.com
  • ns3.us.opalstack.com
MX
  • 10 mx1.de.opalstack.com
  • 10 mx2.de.opalstack.com

Email authentication partial

SPF
v=spf1 include:spf.opalstack.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none
policy: none (monitoring only)
DKIM
  • dkim: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC+XxWa6lc+vbktQTnVpzfD2e+75UsyMJ7+AzkWUlf90z+70Fu9Q6ZEoUeQl1A/G85IsmzAB44RnsWYZB7/Yp…
selectors probed

Certificate (current)

R13
from 2026-03-15 to 2026-06-13
Expires in 25 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Links to (2)

Linked from (1)