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 Code200 HTTP VersionHTTP/1.1 HTTPS✔ Available IP Address185.27.20.177 Server Softwarenginx/1.22.1 Compressiongzip ℹ 🔵Missing HSTSHTTP Strict Transport Security is not configured. Recommended for HTTPS sites. ℹ 🔵Missing Content Security PolicyCSP is not configured. It helps prevent XSS attacks and content injection. ℹ 🔵Missing X-Frame-OptionsThe site can be embedded in iframes by third parties (clickjacking risk).
Performance
DNS Lookup
100.8 ms
TCP Connect
122.1 ms
TLS Handshake
25.3 ms
Time To First Byte (TTFB)
170.6 ms
Content Download
0.1 ms
Total Response Time
170.6 ms
DNS Lookup100.8 ms TCP Connect122.1 ms TLS Handshake25.3 ms Time To First Byte (TTFB)170.6 ms Content Download0.1 ms Total Response Time170.6 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
DocBook.org
TitleDocBook.org
Detected Technologies
Technology
Nginx
TechnologyNginx
HTTP Headers
Server
nginx/1.22.1
Date
Thu, 20 Aug 2026 09:46:39 GMT
Content-type
text/html; charset=utf-8
Last-modified
Mon, 25 May 2026 16:26:05 GMT
Etag
W/"6a14781d-99d"
X-clacks-overhead
GNU Terry Pratchett
Content-encoding
gzip
Meta Tags
Content-Type
text/html; charset=utf-8
Viewport
width=device-width, initial-scale=1.0
Dc.modified
2026-05-25T16:25:44Z
Generator
DocBook xslTNG version 2.7.0 / df163a036 / SAXON HE 12.9
Servernginx/1.22.1 DateThu, 20 Aug 2026 09:46:39 GMT Content-typetext/html; charset=utf-8 Last-modifiedMon, 25 May 2026 16:26:05 GMT EtagW/"6a14781d-99d" X-clacks-overheadGNU Terry Pratchett Content-encodinggzip
Content-Typetext/html; charset=utf-8 Viewportwidth=device-width, initial-scale=1.0 Dc.modified2026-05-25T16:25:44Z GeneratorDocBook xslTNG version 2.7.0 / df163a036 / SAXON HE 12.9
