Technical Information
| HTTP Status Code | 403 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 54.227.153.25 |
| Server Software | CloudFront |
| CDN | AWS CloudFront |
|
🚫 🟡 HTTP 403 Error | The server returned a 403 error. Check the access configuration. |
|
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 403
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 54.227.153.25
Server Software CloudFront
CDN AWS CloudFront
🚫 🟡 HTTP 403 Error The server returned a 403 error. Check the access configuration.
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://realclearscience.com:443 | 301 | HTTP/1.1 301 Moved Permanently |
| 2 | http://www.realclearscience.com/ | 301 | HTTP/1.1 301 Moved Permanently |
| 3 | https://www.realclearscience.com/ | 403 | HTTP/2 403 |
#1 URL https://realclearscience.com:443
HTTP Status Code 301
Status HTTP/1.1 301 Moved Permanently
#2 URL http://www.realclearscience.com/
HTTP Status Code 301
Status HTTP/1.1 301 Moved Permanently
#3 URL https://www.realclearscience.com/
HTTP Status Code 403
Status HTTP/2 403
Performance
| DNS Lookup | 0.6 ms |
| TCP Connect | 1.6 ms |
| TLS Handshake | 7 ms |
| Time To First Byte (TTFB) | 51 ms |
| Content Download | 0 ms |
| Total Response Time | 51 ms |
DNS Lookup 0.6 ms
TCP Connect 1.6 ms
TLS Handshake 7 ms
Time To First Byte (TTFB) 51 ms
Content Download 0 ms
Total Response Time 51 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 | realclearscience.com |
Title realclearscience.com
HTTP Headers
| Server | CloudFront |
| Date | Tue, 28 Jul 2026 17:34:32 GMT |
| Content-type | text/html;charset=utf-8 |
| Content-length | 783 |
| X-datadome | protected |
| Accept-ch | Sec-CH-UA,Sec-CH-UA-Mobile,Sec-CH-UA-Platform,Sec-CH-UA-Arch,Sec-CH-UA-Full-Version-List,Sec-CH-UA-Model,Sec-CH-Device-Memory |
| Charset | utf-8 |
| Cache-control | max-age=0, private, no-cache, no-store, must-revalidate |
| Pragma | no-cache |
| X-datadome-cid | AHrlqAAAAAMAne6_b-FCfcYA8zJWSQ== |
| X-dd-b | 3 |
| Set-cookie | datadome=u0x_WBzlckNJ4_AS5angKLCZuy9P1GFhL5mYyum1o8XzWLbm61VBcCh0fqSqDfHvz2yfBAuPa0w_ZRtaedaFzvpVrVH0aPGcnN9YBxmjj2BjxS14i7dmNFIcbhxWmHMf; Max-Age=31536000; Domain=.realclearscience.com; Path=/; Secure; SameSite=Lax |
| X-cache | LambdaGeneratedResponse from cloudfront |
| Via | 1.1 8e9b80092a2c6949e1181dd5d05813f0.cloudfront.net (CloudFront) |
| X-amz-cf-pop | CDG54-P2 |
| X-amz-cf-id | bs7BwE3nJ70LRvRnLBbQ1NfNytYz2FA-UYIeONI98YPUkiclI-zMgw== |
Server CloudFront
Date Tue, 28 Jul 2026 17:34:32 GMT
Content-type text/html;charset=utf-8
Content-length 783
X-datadome protected
Accept-ch Sec-CH-UA,Sec-CH-UA-Mobile,Sec-CH-UA-Platform,Sec-CH-UA-Arch,Sec-CH-UA-Full-Version-List,Sec-CH-UA-Model,Sec-CH-Device-Memory
Charset utf-8
Cache-control max-age=0, private, no-cache, no-store, must-revalidate
Pragma no-cache
X-datadome-cid AHrlqAAAAAMAne6_b-FCfcYA8zJWSQ==
X-dd-b 3
Set-cookie datadome=u0x_WBzlckNJ4_AS5angKLCZuy9P1GFhL5mYyum1o8XzWLbm61VBcCh0fqSqDfHvz2yfBAuPa0w_ZRtaedaFzvpVrVH0aPGcnN9YBxmjj2BjxS14i7dmNFIcbhxWmHMf; Max-Age=31536000; Domain=.realclearscience.com; Path=/; Secure; SameSite=Lax
X-cache LambdaGeneratedResponse from cloudfront
Via 1.1 8e9b80092a2c6949e1181dd5d05813f0.cloudfront.net (CloudFront)
X-amz-cf-pop CDG54-P2
X-amz-cf-id bs7BwE3nJ70LRvRnLBbQ1NfNytYz2FA-UYIeONI98YPUkiclI-zMgw==
