Dries Buytaert

HTTP Headers Analyzer

7 / 10
http://filmmvygva.oooport.ru/sbdsgocs-utalmiwn.html
Website → CloudFlare → Browser
7 missing headers, 0 warnings, 2 notices
Header
Value
Explanation
date
sun, 22 dec 2024 11:31:09 gmt
The date and time at which the request was made. A browser uses it for age calculations rather than using its own internal date and time; e.g. when comparing against Max-Age or Expires.
content-type
text/html; charset=utf-8
The type of the message body, specified as a MIME type.
connection
keep-alive
Specifies whether the network connection stays open after the current request. keep-alive specifies that the browser would like to keep the connection open, while close indicates that the browser wants to close the connection.
x-frame-options
sameorigin
X-Frame-Options prevents this URL from being embedded in an iframe. This protects against clickjacking attacks.
sameorigin means that this page can be displayed in a iframe, but only on the currrent origin. It can't be displayed on another domain. Consider setting this to deny for added security.
referrer-policy
same-origin
When a visitor navigates from one page to another page, browsers often pass along referrer information. The Referrer-Policy header controls how much referrer information a browser can share. This is important because private information can be embedded in the path or query string.
same-origin means that the protocol, host, port, path and query string are shared for same-site requests. For cross-site requests, nothing is shared.
cache-control
max-age=15
max-age specifies the maximum amount of seconds a page is considered valid. The higher max-age, the longer a page can be cached.
Notice A max-age of 15 seconds is short, especially if your content doesn't change frequently. Consider increasing max-age unless the URL has live updates.
expires
sun, 22 dec 2024 11:31:24 gmt
This Expires date is in the future: the page can be served from a cache. The page is set to expire in 15 seconds. At that point, caches should be refreshed.
Notice Because there is a Cache-Control header with a max-age and/or s-maxage directive, the Expires header will be ignored. Consider removing Expires to save bandwidth and processing power.
report-to
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=3x9dlkbv9gxigl%2bizonvad8es5jvhzfq7ern8v7bxoijrjccevvudv9kqghnd9ln8vfb6afph3vwb1b1h1nlfbiemen1m5utvzbmtj%2bic72t4r7u4e02guw98s%2fo0pvi%2fzgja%2fjdh%2fy%3d"}],"group":"cf-nel","max_age":604800}
This header is part of the Reporting API specification. They are used to configure the reporting of network errors and other issues to a specified endpoint.
The Report-To header specifies where reports should be sent.
group defines the reporting group. Groups allow reports to be grouped logically; e.g. there could be a group for network errors and a second group for browser feature deprecation reports.
max_age defines the number of seconds the browser should remember these settings. Prevents the browser from having to parse the JSON on each request.
endpoints defines one or more URLs where the reports need to be send to. Multiple URLs can be specified for failover and load-balancing. Endpoints can be assigned a weight to distribute load, with each endpoint receiving a specified fraction of the reporting traffic. Endpoints can also be assigned a priority to set up fallback collectors.
nel
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
This header is part of the Reporting API specification. They are used to configure the reporting of network errors and other issues to a specified endpoint.
The NEL (Network Error Logging) header configures the reporting of network errors.
report_to defines the reporting group that reports for this NEL policy will be sent to. The reporting group details are specified in the Report-To header.
max_age defines the number of seconds the browser should remember these settings. Prevents the browser from having to parse the JSON on each request.
success_fraction defines the sampling rate that should be applied to reports about successful network requests. Its value must be a number between 0.0 and 1.0: 0 means no successful requests should be reported, and 1 means that every successful request should be reported.
server
cloudflare
cf-ray
8f5fc8b00c259c25-iad
The cf-ray header provides a unique identifier for each request through Cloudflare. It's useful for troubleshooting and tracking requests in Cloudflare logs.
alt-svc
h3=":443"; ma=86400
The alt-svc header advertises alternative services for accessing the same resource, enabling protocol negotiation and potential performance improvements.
h3 indicates that HTTP/3 is supported. Variants like h3-29 refer to specific drafts of the HTTP/3 protocol.
ma=86400 specifies that the alternative service information is fresh for 86400 seconds.
server-timing
cfl4;desc="?proto=tcp&rtt=866&min_rtt=866&rtt_var=433&sent=1&recv=3&lost=0&retrans=0&sent_bytes=0&recv_bytes=83&delivery_rate=0&cwnd=212&unsent_bytes=0&cid=0000000000000000&ts=0&x=0"
Communicates one or more metrics for a given request-response cycle. Can includes metrics for CPU time, database read/writes, file system access, etc.
strict-transport-security
missing Add a Strict-Transport-Security header. The Strict-Transport-Security header or HSTS header is used to instruct browsers to only use HTTPS, instead of using HTTP. It helps enforce secure communication.
content-security-policy
missing Add a Content-Security-Policy header. The Content-Security-Policy header helps browsers prevent cross site scripting (XSS) and data injection attacks.
permissions-policy
missing Add a Permissions-Policy header. Restrict access to device features like the camera, microphone, location, accelerometer and much more.
cross-origin-embedder-policy
missing Add a Cross-Origin-Embedder-Policy to specify how this page can be loaded by cross-origin resources.
cross-origin-opener-policy
missing Add a Cross-Origin-Opener-Policy header to opt-in into better browser isolation.
cross-origin-resource-policy
missing Add a Cross-Origin-Resource-Policy header to specify who can load this page.
x-permitted-cross-domain-policies
missing Add a X-Permitted-Cross-Domain-Policies header to prevent Flash, Adobe Reader and other clients from sharing data across domains.

Questions or feedback? Email dries@buytaert.net.