HTTP Headers Analysis for https://www.a4a.de

Detected Technologies from Headers

See all in URL Inspect 1

Apache

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=31536000

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Add Content-Security-Policy header to prevent XSS attacks
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• Add X-Content-Type-Options: nosniff
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
• Consider adding Permissions-Policy to control browser features

Performance Headers

Accept-Ranges

Performance

bytes

Connection

Performance

close

Vary

Performance

Accept-Encoding

accept-ranges: bytes
connection: close
vary: Accept-Encoding

Caching Headers

Etag

Caching

"1fa8-5d4b0b84ff349"

Last-Modified

Caching

Mon, 03 Jan 2022 17:19:15 GMT

etag: "1fa8-5d4b0b84ff349"
last-modified: Mon, 03 Jan 2022 17:19:15 GMT

Content Headers

Content-Length

Content

8104

Content-Type

Content

text/html

content-length: 8104
content-type: text/html

Server Headers

Server

Apache

server: Apache

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Sat, 25 Apr 2026 16:03:39 GMT

date: Sat, 25 Apr 2026 16:03:39 GMT

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching