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felixyu.org

.org crawl

First seen 2026-04-20 · Last seen 2026-05-10 · ok HTTP/1.1 200 1458 ms crawled 2026-05-13

US · 185.199.108.153 · AS54113 Fastly, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Felix X. Yu
Language
en

Technology

CDN
Fastly
Server
GitHub.com
Analytics
  • Google Tag Manager

Third-party hosts loaded (1)

  • www.googletagmanager.com×1

Social

Registration

Registrar
GoDaddy.com, LLC
Created
2013-06-27
Expires
2032-06-27 2231 days left
Updated
2025-06-06
Name servers
  • ns51.domaincontrol.com
  • ns52.domaincontrol.com

DNS records live

NS
  • ns51.domaincontrol.com
  • ns52.domaincontrol.com
MX
  • 0 felixyu-org.mail.protection.outlook.com
TXT
  • google-site-verification=8z9flQyrNfNJqODivkbD2wyZrA0gJkNde2NpqKOMcig
  • NETORGFT11585695.onmicrosoft.com

Email authentication weak

SPF
v=spf1 include:secureserver.net -all
strict (-all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-05-01 to 2026-07-30
Expires in 72 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://felixyu.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)