HTTP Headers Analysis for https://gridsuite.org

Detected Technologies from Headers

See all in URL Inspect 5

Cloudflare NEL Monitoring

Cloudflare CDN

Fastly

GitHub

Varnish

HTTP Security Headers

Status

Strict-Transport-Security

Weak

max-age=0; includeSubDomains; preload

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

Good

nosniff

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 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

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

Caching Headers

Age

Caching

0

Cache-Control

Caching

max-age=600

Expires

Caching

Tue, 21 Jul 2026 14:32:54 GMT

Last-Modified

Caching

Tue, 07 Jul 2026 09:31:45 GMT

age: 0
cache-control: max-age=600
expires: Tue, 21 Jul 2026 14:32:54 GMT
last-modified: Tue, 07 Jul 2026 09:31:45 GMT

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

Server

cloudflare

server: cloudflare

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

a1eadc447f76c97e-IAD

Date

Other

Tue, 21 Jul 2026 14:22:54 GMT

Nel

Other

Report-To Group cf-nel max-age: 1w

success: 0.0%

Report-To

Other

Group cf-nel max-age: 1w

Endpoint 1 https://a.nel.cloudflare.com/report/v4?s=qErKji%2FHPaZZ8VQZ9SY2WOG0wlRq0fe3FUiRwdBf2M2oWH9v91VbWWVzrw2G%2B3jickhY654%2BQmKsLMGQ%2B3sYBrYcSjYAAgJluGjoCAMNultdKzaiYu82rDsPn5MJJyIjbV3uUg%3D%3D

Server-Timing

Other

cfCacheStatus;desc="DYNAMIC", cfEdge;dur=15,cfOrigin;dur=33

Via

Other

1.1 varnish

X-Cache

Other

MISS

X-Cache-Hits

Other

0

X-Fastly-Request-Id

Other

e28cabc65820f3a5297339b2f10c3ac651b7e4ac

X-Github-Request-Id

Other

7D94:249DD:A62DD74:AC34E37:6A5F80BD

X-Proxy-Cache

Other

MISS

X-Served-By

Other

cache-iad-kiad7000170-IAD

X-Timer

Other

S1784643774.175191,VS0,VE27

alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
cf-ray: a1eadc447f76c97e-IAD
date: Tue, 21 Jul 2026 14:22:54 GMT
nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=qErKji%2FHPaZZ8VQZ9SY2WOG0wlRq0fe3FUiRwdBf2M2oWH9v91VbWWVzrw2G%2B3jickhY654%2BQmKsLMGQ%2B3sYBrYcSjYAAgJluGjoCAMNultdKzaiYu82rDsPn5MJJyIjbV3uUg%3D%3D"}]}
server-timing: cfCacheStatus;desc="DYNAMIC", cfEdge;dur=15,cfOrigin;dur=33
via: 1.1 varnish
x-cache: MISS
x-cache-hits: 0
x-fastly-request-id: e28cabc65820f3a5297339b2f10c3ac651b7e4ac
x-github-request-id: 7D94:249DD:A62DD74:AC34E37:6A5F80BD
x-proxy-cache: MISS
x-served-by: cache-iad-kiad7000170-IAD
x-timer: S1784643774.175191,VS0,VE27

Recommendations

Enable compression (gzip/brotli) to improve performance