Server: nginx

Announces web server software and optionally version details.

Link: </static/bower_components/bootstrap/dist/css/bootstrap.min.css>; rel=prefetch; as=style

Indicates location of sub-resources for the given page, in machine-readable format. It may come in a number of types, for example next page, previous page, index page, preloading resources etc.

Link:  </static/bower_components/bootstrap/dist/css/bootstrap-theme.min.css>; rel=prefetch; as=style

Indicates location of sub-resources for the given page, in machine-readable format. It may come in a number of types, for example next page, previous page, index page, preloading resources etc.

Link:  </static/bower_components/font-awesome/css/fontawesome.min.css>; rel=prefetch; as=style

Indicates location of sub-resources for the given page, in machine-readable format. It may come in a number of types, for example next page, previous page, index page, preloading resources etc.

Link:  </static/wps.css>; rel=prefetch; as=style

Indicates location of sub-resources for the given page, in machine-readable format. It may come in a number of types, for example next page, previous page, index page, preloading resources etc.

Link:  </static/style.css>; rel=prefetch; as=style

Indicates location of sub-resources for the given page, in machine-readable format. It may come in a number of types, for example next page, previous page, index page, preloading resources etc.

Link:  </static/bower_components/jquery/dist/jquery.min.js>; rel=prefetch; as=script

Indicates location of sub-resources for the given page, in machine-readable format. It may come in a number of types, for example next page, previous page, index page, preloading resources etc.

Link:  </static/no_photo_small.gif>; rel=prefetch; as=image

Indicates location of sub-resources for the given page, in machine-readable format. It may come in a number of types, for example next page, previous page, index page, preloading resources etc.

Link:  </static/1F36A.png>; rel=prefetch; as=image

Indicates location of sub-resources for the given page, in machine-readable format. It may come in a number of types, for example next page, previous page, index page, preloading resources etc.

DNT: 0

Do-Not-Track (DNT) header can be seen in both in HTTP request and response. In the request, it indicates the user's preference as it comes to online tracking and behavioral advertising (1=don't mind tracking, 0=do not track). In response, a compliant server should respond with the same value. In addition, Tk (Tracking Status) header should be set.detailing the tracking policy.

Tk: T

Tracking Status header provides detailed information on server's tracking policy and status. Most common values are N (not tracking) and T (tracking with user consent).

X-Content-Type-Options: nosniff

A non-standard but widely accepted header introduced originally by Microsoft to disable "content sniffing" or heuristic content type discovery in absence or mismatch of a proper HTTP Content-Type declaration, which led to a number of web attacks. In general, presence of the header with its only defined value of nosniff is considered as part of a properly secured HTTP response.

X-XSS-Protection: 1; mode=block; report=https://reports.krvtz.net/xss

Controls an Cross-Site Scripting (XSS) filters built into the majority of web browsers. The filter is usually turned on by default anyway, but requirement to set the header to 1 became part of canonical set of "secure" HTTP headers. Over time, vulnerabilities in the "sanitizing" mode filter were found, so 1; mode=block became the recommended value. Some companies decided that they don't really need a browser-side XSS filter to mess with their web services which are XSS-free anyway and they became consciously disabling the XSS filter by setting the header to 0.

X-Frame-Options: sameorigin

Instructs the browser if the current website can be embedded in HTML frame by another website. Since this allows the parent website to control the framed page, this creates a potential for data theft attacks ("clickjacking") and most sensitive websites won't allow them to be framed at all (deny) or just allow parts of them to be embedded in frames created by themselves only (samesite).

Public-Key-Pins: pin-sha256="YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg="; pin-sha256="Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys="; pin-sha256="sRHdihwgkaib1P1gxX8HFszlD+7/gTfNvuAybgLPNis="; pin-sha256="C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=";  max-age=15552000; includeSubDomains; report-uri="http://reports.krvtz.net/hpkp; report-to=hpkp"

Announces a list of X.509 certificate hashes that are allowed to appear in the website's TLS certification path (HTTP Public Key Pinning or HPKP). This prevents malicious proxy servers from transparently replacing the public certificates with their own and wiretapping the TLS connection of the unsuspecting user. This header sets HPKP in enforcement mode.

Expect-CT: max-age=86400, enforce, report-uri="http://reports.krvtz.net/ct"

The Expect-CT header allows sites to opt in to reporting and/or enforcement of Certificate Transparency requirements, which prevents the use of misissued certificates for that site from going unnoticed. When a site enables the Expect-CT header, they are requesting that the browser check that any certificate for that site appears in public CT logs.

Strict-Transport-Security: max-age=63072000; preload; includeSubDomains

HTTP Strict Transport Security (HSTS) is an opt-in security enhancement that is specified by a web application through the use of a special response header.

NEL: {"report_to": "nel", "max_age": 10886400}

Network Error Logging (NEL) defines a mechanism enabling web applications to declare a reporting policy that can be used by an user agent to report network errors for a given origin.

Report-To: { "group": "csp", "max_age": 10886400, "endpoints": [ { "url": "https://reports.krvtz.net/csp" } ] }, { "group": "hpkp", "max_age": 10886400, "endpoints": [ { "url": "http://reports.krvtz.net/hpkp" } ] }, { "group": "nel", "max_age": 10886400, "endpoints": [ { "url": "http://reports.krvtz.net/nel" } ] }

The header defines a generic reporting framework which allows web developers to associate a set of named reporting endpoints with an origin. Various platform features (like Content Security Policy, Network Error Reporting, and others) may use these endpoints to deliver feature-specific reports in a consistent manner.

X-Permitted-Cross-Domain-Policies: none

Header used by Adobe Flash engine to control cross-site access for Flash applications. Most websites not using Flash would prefer to set it with the value of none as an additional precaution against using them in advanced Flash-based XSS vectors. Flash-serving websites can use them to declare the scope of detailed Flash cross-site policies per Adobe specification.

X-Clacks-Overhead: GNU Terry Pratchett

Purely informational and non-standard header initially established in memory of a popular fantasy author Terry Pratchett. Counterintuitively for most IT people, the most frequently seen value GNU is not related to the open-source GNU project, but rather is a sophisticated telegraph code originating from Pratchett's "Discworld" cult series.

Referrer-Policy: strict-origin-when-cross-origin

The Referrer-Policy HTTP header governs which referrer information, sent in the Referer header, should be included with requests made.

Feature-Policy: accelerometer 'none'; ambient-light-sensor 'none'; autoplay 'none'; camera 'none'; encrypted-media 'none'; fullscreen 'none'; geolocation 'none'; gyroscope 'none'; magnetometer 'none'; microphone 'none'; midi 'none'; payment 'none'; picture-in-picture 'none'; speaker 'none'; sync-xhr 'none'; usb 'none'; vr 'none'

Allows web developers selectively enable and disable specific web technologies, especially those that enable two-way communication between the user and web application. For example, the header may inform the user mobile device that the website is not using camera or location tracking by design.

base-uri 'none'; connect-src 'self'; font-src 'self'; frame-src 'none'; img-src 'self' https://images.pexels.com data:; manifest-src 'self'; media-src 'none'; prefetch-src 'self'; object-src 'none'; script-src https: 'unsafe-inline' 'self' 'nonce-54a903f2878fcc2457a18453c96e9cbbef6a735dc57deeccdd33c5fde54e0e88' 'strict-dynamic' 'report-sample'; style-src 'self' 'sha256-47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=' 'report-sample'; worker-src 'none'; report-uri https://reports.krvtz.net/csp; report-to csp; block-all-mixed-content

• Policy delivery method: Content-Security-Policy
• Enforcement: True