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URL redirection is sometimes used as a part of phishing attacks that confuse visitors about which web site they are visiting. [5] Because modern browsers always show the real URL in the address bar, the threat is lessened. However, redirects can also take you to sites that will otherwise attempt to attack in other ways.
The HTTP Location header field is returned in responses from an HTTP server under two circumstances: To ask a web browser to load a different web page (URL redirection). In this circumstance, the Location header should be sent with an HTTP status code of 3xx. It is passed as part of the response by a web server when the requested URI has:
Cross-origin resource sharing (CORS) is a mechanism to safely bypass the same-origin policy, that is, it allows a web page to access restricted resources from a server on a domain different than the domain that served the web page. A web page may freely embed cross-origin images, stylesheets, scripts, iframes, and videos.
Make sure the box for "Cached Web Content" is checked and click "Clear", (be sure the "Cookies and Site Data" box is unchecked if you do not want to clear this data as well). In versions of Firefox that display a single, orange "Firefox" button: click the "Firefox" button and click "Options".
Caching Behavior: Many web browsers cache 301 redirects. This means that once a user's browser encounters a 301 redirect, subsequent requests to the original URL will be automatically directed to the new URL without contacting the server. Updating Bookmarks: Browsers may update bookmarks to reflect the new URL after encountering a 301 redirect.
Domain masking or URL masking is the act of hiding the actual domain name of a website from the URL field of a user's web browser in favor of another name. [1] There are many ways to do this, including the following examples. HTML inline frame or frameset so a frame embedded in the main website actually points to some other site.
When visiting a web page, the referrer or referring page is the URL of the previous web page from which a link was followed. More generally, a referrer is the URL of a previous item which led to this request. For example, the referrer for an image is generally the HTML page on which it is to be displayed.
The threat involves using a PAC, discovered automatically by the system, to redirect the victim's browser traffic to an attacker-controlled server instead. Another issue with pac-file is that the typical implementation involve clear text http retrieval, which does not include any security features such as code signing or web certificates.