Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 54.213.55.143 |
| Server Software | nginx/1.29.8 |
| Compression | gzip |
|
🔒 🟡 Mixed Content (80 HTTP resources) | The page is served over HTTPS but loads 80 resource(s) over HTTP. This may be blocked in modern browsers. |
|
🕐 🟡 Slow Response (1114 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 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 54.213.55.143
Server Software nginx/1.29.8
Compression gzip
🔒 🟡 Mixed Content (80 HTTP resources) The page is served over HTTPS but loads 80 resource(s) over HTTP. This may be blocked in modern browsers.
🕐 🟡 Slow Response (1114 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).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://nuclearsecrecy.com:443 | 302 | HTTP/1.1 302 Found |
| 2 | http://blog.nuclearsecrecy.com/ | 200 | HTTP/1.1 200 OK |
#1 URL https://nuclearsecrecy.com:443
HTTP Status Code 302
Status HTTP/1.1 302 Found
#2 URL http://blog.nuclearsecrecy.com/
HTTP Status Code 200
Status HTTP/1.1 200 OK
Performance
| DNS Lookup | 103.4 ms |
| TCP Connect | 270.9 ms |
| TLS Handshake | ~80 ms |
| Time To First Byte (TTFB) | 611.2 ms |
| Content Download | 503 ms |
| Total Response Time | 1114.2 ms |
DNS Lookup 103.4 ms
TCP Connect 270.9 ms
TLS Handshake ~80 ms
Time To First Byte (TTFB) 611.2 ms
Content Download 503 ms
Total Response Time 1114.2 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 | Restricted Data: The Nuclear Secrecy Blog |
| Meta Description | Restricted Data is a blog about nuclear secrecy, past and present, run by Alex Wellerstein, an historian of science. |
| Canonical | https://blog.nuclearsecrecy.com/ |
| Robots Meta | index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1 |
| Twitter Card | summary_large_image |
| Twitter Title | Restricted Data: The Nuclear Secrecy Blog |
| Twitter Description | Restricted Data is a blog about nuclear secrecy, past and present, run by Alex Wellerstein, an historian of science. |
Title Restricted Data: The Nuclear Secrecy Blog
Meta Description Restricted Data is a blog about nuclear secrecy, past and present, run by Alex Wellerstein, an historian of science.
Canonical https://blog.nuclearsecrecy.com/
Robots Meta index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
Twitter Card summary_large_image
Twitter Title Restricted Data: The Nuclear Secrecy Blog
Twitter Description Restricted Data is a blog about nuclear secrecy, past and present, run by Alex Wellerstein, an historian of science.
Detected Technologies
| Technology | WordPress WooCommerce Google Analytics Google Tag Manager Cloudflare Nginx PHP Node.js |
Technology WordPress WooCommerce Google Analytics Google Tag Manager Cloudflare Nginx PHP Node.js
HTTP Headers
| Date
| Fri, 24 Jul 2026 23:44:30 GMT |
| Server
| nginx/1.29.8 |
| Content-Type
| text/html; charset=UTF-8 |
| Vary
| accept,content-type,Accept-Encoding |
| Link
| ; rel="https://api.w.org/" |
| Cache-Control
| max-age=7200 |
| Expires
| Sat, 25 Jul 2026 01:44:30 GMT |
| Content-Encoding
| gzip |
| Host-header
| c2hhcmVkLmJsdWVob3N0LmNvbQ== |
| X-Endurance-Cache-Level
| 0 |
| X-nginx-cache
| WordPress |
| X-Server-Cache
| true |
| X-Proxy-Cache
| EXPIRED |
| Transfer-Encoding
| chunked |
Meta Tags
| Content-Type | text/html; charset=UTF-8 |
| Msapplication-TileColor | #d0d0d0 |
| Msapplication-TileImage |  |
| Theme-color | #d0d0d0 |
| Robots | index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1 |
| Description | Restricted Data is a blog about nuclear secrecy, past and present, run by Alex Wellerstein, an historian of science. |
| Generator | WordPress 7.0.2 |
Date Fri, 24 Jul 2026 23:44:30 GMT
Server nginx/1.29.8
Content-Type text/html; charset=UTF-8
Vary accept,content-type,Accept-Encoding
Link ; rel="https://api.w.org/"
Cache-Control max-age=7200
Expires Sat, 25 Jul 2026 01:44:30 GMT
Content-Encoding gzip
Host-header c2hhcmVkLmJsdWVob3N0LmNvbQ==
X-Endurance-Cache-Level 0
X-nginx-cache WordPress
X-Server-Cache true
X-Proxy-Cache EXPIRED
Transfer-Encoding chunked
