HTTP Headers Analysis for https://kalo.flku.dev

Detected Technologies from Headers

See all in URL Inspect 3

Cloudflare NEL Monitoring

Cloudflare CDN

Express

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

Content-Security-Policy

Weak

frame-ancestors Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin-when-cross-origin

Permissions-Policy

Present

geolocation=(), microphone=(), camera=()

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• Significantly strengthen CSP directives
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking

Performance Headers

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Origin, accept-encoding

connection: close
transfer-encoding: chunked
vary: Origin, accept-encoding

Caching Headers

No caching headers found

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

Server

cloudflare

X-Powered-By

Server

Express

server: cloudflare
x-powered-by: Express

CORS Headers

Access-Control-Allow-Credentials

Cors

true

access-control-allow-credentials: true

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Cf-Cache-Status

Other

DYNAMIC

Cf-Ray

Other

a22c67de3d5ad46b-IAD

Date

Other

Wed, 29 Jul 2026 13:17:47 GMT

Nel

Other

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

success: 0.0%

Ratelimit-Limit

Other

60

Ratelimit-Policy

Other

60;w=60

Ratelimit-Remaining

Other

59

Ratelimit-Reset

Other

60

Report-To

Other

Group cf-nel max-age: 1w

Endpoint 1 https://a.nel.cloudflare.com/report/v4?s=dTOflh72UCT6CqAhDmu2RFHyx626jXMtv26D0%2BEGr5k6lJsYclD1bdV%2BUvT5a3s9%2FDrxtYA%2Fl3cZHvXyr67Xnlzm3WmnJvlHygELRxkZIV7ktnK4xqHJnWKAEfEqkAl%2F

Server-Timing

Other

cfCacheStatus;desc="DYNAMIC", cfEdge;dur=238,cfOrigin;dur=1159

Speculation-Rules

Other

"/cdn-cgi/speculation"

alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
cf-ray: a22c67de3d5ad46b-IAD
date: Wed, 29 Jul 2026 13:17:47 GMT
nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
ratelimit-limit: 60
ratelimit-policy: 60;w=60
ratelimit-remaining: 59
ratelimit-reset: 60
report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=dTOflh72UCT6CqAhDmu2RFHyx626jXMtv26D0%2BEGr5k6lJsYclD1bdV%2BUvT5a3s9%2FDrxtYA%2Fl3cZHvXyr67Xnlzm3WmnJvlHygELRxkZIV7ktnK4xqHJnWKAEfEqkAl%2F"}]}
server-timing: cfCacheStatus;desc="DYNAMIC", cfEdge;dur=238,cfOrigin;dur=1159
speculation-rules: "/cdn-cgi/speculation"

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching

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