HTTP Headers Analysis for https://cdn.knack.com

Detected Technologies from Headers

See all in URL Inspect 2

AWS CloudFront

Amazon S3

HTTP Security Headers

Status

Strict-Transport-Security

Excellent

max-age=63072000; includeSubDomains; preload

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

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Content-Security-Policy header to prevent XSS attacks
• 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

Connection

Performance

close

Transfer-Encoding

Performance

chunked

Vary

Performance

Origin

connection: close
transfer-encoding: chunked
vary: Origin

Caching Headers

No caching headers found

Content Headers

Content-Type

Content

application/xml

content-type: application/xml

Server Headers

Server

AmazonS3

server: AmazonS3

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Sun, 24 May 2026 16:41:21 GMT

Via

Other

1.1 dfc1931cc62ecd4133c2b9bdae1bb476.cloudfront.net (CloudFront)

X-Amz-Cf-Id

Other

G2XPrcl6ki9jykCUeZ2fF11FEyy2vigDYQd1yDNK1l3_JYI7AdTVGA==

X-Amz-Cf-Pop

Other

IAD12-P3

X-Cache

Other

Error from cloudfront

date: Sun, 24 May 2026 16:41:21 GMT
via: 1.1 dfc1931cc62ecd4133c2b9bdae1bb476.cloudfront.net (CloudFront)
x-amz-cf-id: G2XPrcl6ki9jykCUeZ2fF11FEyy2vigDYQd1yDNK1l3_JYI7AdTVGA==
x-amz-cf-pop: IAD12-P3
x-cache: Error from cloudfront

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching