HTTP Headers Analysis for https://r25.jp

Detected Technologies from Headers

See all in URL Inspect 3

AWS CloudFront

Envoy

Next.js

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Excellent

DENY

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• 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

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

Caching Headers

Cache-Control

Caching

public, max-age=0, s-maxage=60, must-revalidate

cache-control: public, max-age=0, s-maxage=60, must-revalidate

Content Headers

Content-Type

Content

text/html; charset=utf-8

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

Server Headers

Server

istio-envoy

X-Powered-By

Server

Next.js

server: istio-envoy
x-powered-by: Next.js

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Wed, 20 May 2026 21:09:57 GMT

Link

Other

URL /_next/static/media/24f6ebe2756575bd-s.p.woff2

rel=preload as=font crossorigin type=font/woff2

URL /_next/static/media/904be59b21bd51cb-s.p.woff2

rel=preload as=font crossorigin type=font/woff2

URL /_next/static/css/78572ce3dc1fbe6e.css

rel=preload as=style

URL /_next/static/css/f48e719bb4b4de80.css

rel=preload as=style

Via

Other

1.1 a01680a1fee7e35f1738191420d98822.cloudfront.net (CloudFront)

X-Amz-Cf-Id

Other

JW5VGj-xjb3zglphEPTswONPIdUDjLltyPY23BvVaDSBHo7s4E6VzA==

X-Amz-Cf-Pop

Other

IAD12-P1

X-Cache

Other

Miss from cloudfront

X-Envoy-Upstream-Service-Time

Other

821

date: Wed, 20 May 2026 21:09:57 GMT
link: </_next/static/media/24f6ebe2756575bd-s.p.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/media/904be59b21bd51cb-s.p.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/css/78572ce3dc1fbe6e.css>; rel=preload; as="style", </_next/static/css/f48e719bb4b4de80.css>; rel=preload; as="style"
via: 1.1 a01680a1fee7e35f1738191420d98822.cloudfront.net (CloudFront)
x-amz-cf-id: JW5VGj-xjb3zglphEPTswONPIdUDjLltyPY23BvVaDSBHo7s4E6VzA==
x-amz-cf-pop: IAD12-P1
x-cache: Miss from cloudfront
x-envoy-upstream-service-time: 821

Recommendations

Enable compression (gzip/brotli) to improve performance

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