Checking results for: njau.edu.cn
Additional info for https://njau.edu.cn
Technical Information
| HTTP Status Code | 502 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 218.94.137.110 |
| Server Software | none |
|
💥 🔴 502 Bad Gateway | The proxy server did not receive a valid response from the upstream server. |
|
🕐 🟡 Slow Response (1203 ms) | Response time exceeds 1 second. Consider optimizing the server or using caching. |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 502
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 218.94.137.110
Server Software none
💥 🔴 502 Bad Gateway The proxy server did not receive a valid response from the upstream server.
🕐 🟡 Slow Response (1203 ms) Response time exceeds 1 second. Consider optimizing the server or using caching.
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Performance
| DNS Lookup | 652.5 ms |
| TCP Connect | 834.8 ms |
| TLS Handshake | 186.1 ms |
| Time To First Byte (TTFB) | 1203.2 ms |
| Content Download | 0 ms |
| Total Response Time | 1203.2 ms |
DNS Lookup 652.5 ms
TCP Connect 834.8 ms
TLS Handshake 186.1 ms
Time To First Byte (TTFB) 1203.2 ms
Content Download 0 ms
Total Response Time 1203.2 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
Title 访问出错 - 502
HTTP Headers
| Server | none |
| Date | Sun, 26 Jul 2026 09:43:16 GMT |
| Content-Type | text/html |
| Transfer-Encoding | chunked |
| Connection | keep-alive |
Meta Tags
| Viewport | width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, target-densitydpi=medium-dpi |
Server none
Date Sun, 26 Jul 2026 09:43:16 GMT
Content-Type text/html
Transfer-Encoding chunked
Connection keep-alive
Viewport width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, target-densitydpi=medium-dpi
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