Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 152.19.134.160 |
| Server Software | Caddy |
| Compression | gzip |
|
🔒 🟡 Mixed Content (9 HTTP resources) | The page is served over HTTPS but loads 9 resource(s) over HTTP. This may be blocked in modern browsers. |
|
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 152.19.134.160
Server Software Caddy
Compression gzip
🔒 🟡 Mixed Content (9 HTTP resources) The page is served over HTTPS but loads 9 resource(s) over HTTP. This may be blocked in modern browsers.
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 | 39 ms |
| TCP Connect | 142.2 ms |
| TLS Handshake | 107 ms |
| Time To First Byte (TTFB) | 353.6 ms |
| Content Download | 0.1 ms |
| Total Response Time | 353.7 ms |
DNS Lookup 39 ms
TCP Connect 142.2 ms
TLS Handshake 107 ms
Time To First Byte (TTFB) 353.6 ms
Content Download 0.1 ms
Total Response Time 353.7 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 | The Linux Documentation Project |
Title The Linux Documentation Project
Detected Technologies
Technology PHP
HTTP Headers
| Alt-svc
| h3=":443"; ma=2592000 |
| Content-encoding
| gzip |
| Content-type
| text/html; charset=utf-8 |
| Date
| Mon, 20 Jul 2026 22:17:36 GMT |
| Etag
| "d5ms71putbc67s7-gzip" |
| Last-modified
| Fri, 15 Nov 2024 13:20:04 GMT |
| Server
| Caddy |
| Vary
| Accept-Encoding |
Alt-svc h3=":443"; ma=2592000
Content-encoding gzip
Content-type text/html; charset=utf-8
Date Mon, 20 Jul 2026 22:17:36 GMT
Etag "d5ms71putbc67s7-gzip"
Last-modified Fri, 15 Nov 2024 13:20:04 GMT
Server Caddy
Vary Accept-Encoding
