yihedong.me

.me crawl

First seen 2026-04-15 · Last seen 2026-05-07 · ok HTTP/1.1 200 2848 ms crawled 2026-05-10

US · 192.30.252.154 · AS36459 GitHub, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: Yihe Dong
Description: Yihe Dong: math, coding, and world musings.
Language: en-us

Technology

CDN: Fastly
Server: GitHub.com

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (3)

fonts.googleapis.com×1
maxcdn.bootstrapcdn.com×1
www.googletagmanager.com×1

DNS records live

NS

dns1.registrar-servers.com
dns2.registrar-servers.com

MX

10 mx1.privateemail.com
10 mx2.privateemail.com

CNAME

twistedcubic.github.io

Email authentication no MX

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

Certificate (current)

R12

from 2026-05-02 to 2026-07-31

Expires in 70 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://yihedong.me/

findings

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

Links to (2)

bing.com×2
microsoft.com×2

Linked from (1)

gautamkamath.com×2