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SGSiteGraph

njau.edu.cn

访问出错 - 502

Last scanned Jul 26, 2026, 5:47 AM

74

Overall score

Fair

Summary

This website is hosted on CHINANET-BACKBONE - No.31,Jin-rong Street, CN. SEO is fair (50/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

China
Hosted on CHINANET-BACKBONE - No.31,Jin-rong Street, CN

Top issues to fix

11 issues found · 4 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

+5 more issues — details in the sections below.

50

SEO

7 issue(s) found

100

Performance

533 ms

65

Security

HTTPS & header checks

90

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Meta tags

Title
访问出错 - 502
Description
Canonical
Language
zh-CN
Charset
UTF-8
Viewport
width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, target-densitydpi=medium-dpi
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

CDN provider
—
IP address
218.94.137.110
ASN
AS4134 (CHINANET-BACKBONE - No.31,Jin-rong Street, CN)

DNS records

TypeValue
A
  • 218.94.137.110
AAAA—
MX
  • hzmx01.mxmail.netease.com
  • hzmx02.mxmail.netease.com
TXT
  • v=spf1 include:spf.163.com -all
  • MS=ms84899815
NS
  • dns3.njau.edu.cn
  • dns2.njau.edu.cn
  • nau.njau.edu.cn
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
WoTrus CA Limited
Subject
*.njau.edu.cn
Valid from
Nov 5, 2025
Valid to
Dec 6, 2026
Days until expiry
133
SAN domains
*.njau.edu.cn, njau.edu.cn

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 1

Links

0 internal · 0 external · 0 broken

Images

1 total · 0 missing alt

Scripts / Styles

1 scripts · 0 stylesheets

JS / CSS size

1.9 KB · 0 B

Page size

2.7 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing meta description
  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • No H1 heading found

Scan details

Requested URL
https://njau.edu.cn
Final URL
https://njau.edu.cn
HTTP status
502
HTTP version
HTTP/1.1
Response time
533 ms
HTML size
2.7 KB
Redirect chain
https://njau.edu.cn

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does njau.edu.cn use?
We did not detect any specific technologies for njau.edu.cn in the latest scan.
Is njau.edu.cn secure (HTTPS)?
Yes. njau.edu.cn uses TLS 1.3 with a certificate issued by WoTrus CA Limited, valid until Dec 6, 2026.
Who hosts njau.edu.cn?
njau.edu.cn is hosted on CHINANET-BACKBONE - No.31,Jin-rong Street, CN.
What is njau.edu.cn's SEO score?
njau.edu.cn scored 50/100 for SEO in the latest analysis (fair).
What is njau.edu.cn's overall website score?
njau.edu.cn has an overall SiteGraph score of 74/100, combining SEO, performance, security, and accessibility.