guandaoyang.com

.com crawl

First seen 2026-04-13 · Last seen 2026-05-16 · ok HTTP/1.1 200 2661 ms crawled 2026-05-07

US · 3.33.152.147 · AS16509 Amazon.com, Inc.

Reputation 62/100 wrong cert weak security headers no dmarc policy

Classifying

HTML metadata

Title: Guandao Yang
Description: Guandao Yang's personal website.
Language: en
Canonical: https://stevenygd.github.io/

Technology

CDN: Fastly
Server: GitHub.com

Fonts

Google Fonts

Third-party hosts loaded (6)

cdn.jsdelivr.net×6
badge.dimensions.ai×1
cdnjs.cloudflare.com×1
d1bxh8uas1mnw7.cloudfront.net×1
fonts.googleapis.com×1
stevenygd.github.io×1

Social

Registration

Registrar

GoDaddy.com, LLC

Created

2017-02-22

Expires

2027-02-22 279 days left

Updated

2022-10-02

Name servers

ns17.domaincontrol.com
ns18.domaincontrol.com

DNS records live

NS

ns17.domaincontrol.com
ns18.domaincontrol.com

MX

0 smtp.secureserver.net
10 mailstore1.secureserver.net

Email authentication partial

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

Certificate (current) wrong cert

R12

from 2026-04-07 to 2026-07-06

Expires in 48 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.guandaoyang.com/

findings

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