Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 104.21.34.42 |
| Server Software | Tengine |
| CDN | CDN (MISS TCP_MISS dirn:-2:-2) |
| Compression | gzip |
|
🔄 🟡 Long Redirect Chain | There are 4 redirects, which may affect SEO and performance. |
|
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 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 104.21.34.42
Server Software Tengine
CDN CDN (MISS TCP_MISS dirn:-2:-2)
Compression gzip
🔄 🟡 Long Redirect Chain There are 4 redirects, which may affect SEO and performance.
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).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://vdd.com:443 | 301 | HTTP/2 301 |
| 2 | https://www.vdd.cn/ | 301 | HTTP/2 301 |
| 3 | http://vdd.cn/ | 301 | HTTP/1.1 301 Moved Permanently |
| 4 | https://vdd.cn/ | 200 | HTTP/2 200 |
#1 URL https://vdd.com:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://www.vdd.cn/
HTTP Status Code 301
Status HTTP/2 301
#3 URL http://vdd.cn/
HTTP Status Code 301
Status HTTP/1.1 301 Moved Permanently
#4 URL https://vdd.cn/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 1 ms |
| TCP Connect | 13.1 ms |
| TLS Handshake | 20.4 ms |
| Time To First Byte (TTFB) | 776.9 ms |
| Content Download | 0.1 ms |
| Total Response Time | 777 ms |
DNS Lookup 1 ms
TCP Connect 13.1 ms
TLS Handshake 20.4 ms
Time To First Byte (TTFB) 776.9 ms
Content Download 0.1 ms
Total Response Time 777 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| Referrer Policy | no-referrer-when-downgrade |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
Referrer Policy no-referrer-when-downgrade
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | VDD - Create Ads That Win |
| Meta Description | VDD Client - Modern Web Application |
| Canonical | https://www.vdd.cn/ |
Title VDD - Create Ads That Win
Meta Description VDD Client - Modern Web Application
Canonical https://www.vdd.cn/
Detected Technologies
| Technology | Google Analytics |
Technology Google Analytics
HTTP Headers
| Server
| Tengine |
| Content-type
| text/html |
| Date
| Tue, 21 Jul 2026 13:45:28 GMT |
| Last-modified
| Tue, 21 Jul 2026 03:00:58 GMT |
| Vary
| Accept-Encoding |
| Etag
| W/"6a5ee0ea-738" |
| Access-control-allow-origin
| * |
| Access-control-allow-methods
| GET, POST, OPTIONS,HEAD |
| Access-control-allow-headers
| Origin, Authorization, Accept, Content-Type, X-Requested-With |
| Access-control-allow-credentials
| true |
| Referrer-policy
| no-referrer-when-downgrade |
| Cache-control
| no-cache, max-age=0, must-revalidate |
| Content-encoding
| gzip |
| Via
| cache13.l2fr1[384,384,200-0,M], cache35.l2fr1[386,0], ens-cache7.fr7[719,719,200-0,M], ens-cache17.fr7[726,0] |
| Ali-swift-global-savetime
| 1784641528 |
| X-cache
| MISS TCP_MISS dirn:-2:-2 |
| X-swift-savetime
| Tue, 21 Jul 2026 13:45:28 GMT |
| X-swift-cachetime
| 0 |
| Timing-allow-origin
| * |
| Eagleid
| 9b66d4a517846415278488933e |
Meta Tags
| Viewport | width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no |
| Description | VDD Client - Modern Web Application |
Server Tengine
Content-type text/html
Date Tue, 21 Jul 2026 13:45:28 GMT
Last-modified Tue, 21 Jul 2026 03:00:58 GMT
Vary Accept-Encoding
Etag W/"6a5ee0ea-738"
Access-control-allow-origin *
Access-control-allow-methods GET, POST, OPTIONS,HEAD
Access-control-allow-headers Origin, Authorization, Accept, Content-Type, X-Requested-With
Access-control-allow-credentials true
Referrer-policy no-referrer-when-downgrade
Cache-control no-cache, max-age=0, must-revalidate
Content-encoding gzip
Via cache13.l2fr1[384,384,200-0,M], cache35.l2fr1[386,0], ens-cache7.fr7[719,719,200-0,M], ens-cache17.fr7[726,0]
Ali-swift-global-savetime 1784641528
X-cache MISS TCP_MISS dirn:-2:-2
X-swift-savetime Tue, 21 Jul 2026 13:45:28 GMT
X-swift-cachetime 0
Timing-allow-origin *
Eagleid 9b66d4a517846415278488933e
