HTTP Headers Analysis for https://dns.sb

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

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin-when-cross-origin

Permissions-Policy

Missing

Not configured

Recommendations

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

Etag

Caching

"696b91ad-1ac82"

Last-Modified

Caching

Sat, 17 Jan 2026 13:42:05 GMT

etag: "696b91ad-1ac82"
last-modified: Sat, 17 Jan 2026 13:42:05 GMT

Content Headers

Content-Length

Content

109698

Content-Type

Content

text/html

content-length: 109698
content-type: text/html

Server Headers

Server

Mac-Studio/2024

server: Mac-Studio/2024

CORS Headers

No CORS headers found

Cookies Headers

No cookies headers found

Other Headers

Alt-Svc

Other

h3=":443"; ma=86400

Date

Other

Thu, 21 May 2026 22:08:17 GMT

alt-svc: h3=":443"; ma=86400
date: Thu, 21 May 2026 22:08:17 GMT

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching