HTTP Headers Analysis for https://flex.apache.org

Detected Technologies from Headers

See all in URL Inspect 2

Apache

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Excellent

max-age=31536000; includeSubDomains; preload

Content-Security-Policy

Basic

default-src; script-src; style-src; +3 more 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

• Improve CSP by adding more specific directives and removing 'unsafe-inline'
• 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

Age

Caching

5678

Etag

Caching

"516c-64bd270d59cf8"

Last-Modified

Caching

Fri, 27 Feb 2026 18:31:08 GMT

age: 5678
etag: "516c-64bd270d59cf8"
last-modified: Fri, 27 Feb 2026 18:31:08 GMT

Content Headers

Content-Length

Content

20844

Content-Type

Content

text/html

content-length: 20844
content-type: text/html

Server Headers

Server

Apache

server: Apache

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Sun, 17 May 2026 01:43:26 GMT

Via

Other

1.1 varnish, 1.1 varnish

X-Cache

Other

MISS, HIT

X-Cache-Hits

Other

0, 0

X-Served-By

Other

cache-hel1410021-HEL, cache-iad-kiad7000155-IAD

X-Timer

Other

S1778982206.317134,VS0,VE107

date: Sun, 17 May 2026 01:43:26 GMT
via: 1.1 varnish, 1.1 varnish
x-cache: MISS, HIT
x-cache-hits: 0, 0
x-served-by: cache-hel1410021-HEL, cache-iad-kiad7000155-IAD
x-timer: S1778982206.317134,VS0,VE107

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching