zhangdubook.com

.com ok HTTP/1.1 200 503 ms

First seen 2026-06-10 · Last seen 2026-06-14 · crawled 2026-06-10

US · 192.154.110.206 · AS53850 GorillaServers, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: 404 页面不存在
Language: zh-CN

Technology

Server: nginx

Registration

Registrar

Gname.com Pte. Ltd.

Created

2018-05-24

Expires

2027-05-24 337 days left

Updated

2026-04-30

Name servers

a.dnspod.com
b.dnspod.com
c.dnspod.com

DNS records live

NS

a.dnspod.com
b.dnspod.com
c.dnspod.com

CNAME

ec29b165.claudecdn.com

Email authentication no MX

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

Certificate (current)

ZeroSSL RSA DV SSL CA 2

from 2026-04-30 to 2026-07-30

Expires in 39 days

Full certificate history on crt.sh ↗

HTTP security headers

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

findings

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

Linked from (24)

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