HTTP Headers Analysis for https://sdui.de

Detected Technologies from Headers

See all in URL Inspect 3

Nginx

PHP

Plesk

HTTP Security Headers

Status

Strict-Transport-Security

Good

max-age=63072000; includeSubDomains

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Consider adding 'preload' to HSTS for maximum security
• Add Content-Security-Policy header to prevent XSS attacks
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
• Consider adding Permissions-Policy to control browser features

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Accept-Encoding, Accept-Encoding

connection: close
transfer-encoding: chunked
vary: Accept-Encoding, Accept-Encoding

Caching Headers

Cache-Control

Caching

max-age=0

Expires

Caching

Tue, 12 May 2026 16:41:48 GMT

Last-Modified

Caching

Tue, 12 May 2026 07:33:19 GMT

cache-control: max-age=0
expires: Tue, 12 May 2026 16:41:48 GMT
last-modified: Tue, 12 May 2026 07:33:19 GMT

Content Headers

Content-Type

Content

text/html; charset=UTF-8

content-type: text/html; charset=UTF-8

Server Headers

Server

nginx

X-Powered-By

Server

PHP/8.1.34, PleskLin

server: nginx
x-powered-by: PHP/8.1.34, PleskLin

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Tue, 12 May 2026 16:41:48 GMT

date: Tue, 12 May 2026 16:41:48 GMT

Recommendations

Enable compression (gzip/brotli) to improve performance

Consider removing X-Powered-By header to hide server technology