Details
When visiting a webpage, the referrer or referring page is the URL of the previous webpage from which a link was followed.
More generally, a referer is the URL of a previous item which led to this request. The referer for an image, for example, is generally the HTML page on which it is to be displayed. The referer field is an optional part of the HTTP request sent by the web browser to the web server.
Many websites log referers as part of their attempt to track their users. Most web log analysis software can process this information. Because referer information can violate privacy, some web browsers allow the user to disable the sending of referer information. Some proxy and firewall software will also filter out referer information, to avoid leaking the location of non-public websites. This can, in turn, cause problems: some web servers block parts of their website to web browsers that do not send the right referer information, in an attempt to prevent deep linking or unauthorised use of images (bandwidth theft). Some proxy software has the ability to give the top-level address of the target website as the referer, which usually prevents these problems while still not divulging the user's last-visited website.
Recently many blogs have started publishing referer information in order to link back to people who are linking to them, and hence broaden the conversation. This has led, in turn, to the rise of referer spam: the sending of fake referer information in order to popularize the spammer's website.
Many pornographic paysites use referer information to secure their websites. Only web browsers arriving from a small set of approved (login) pages are given access; this facilitates the sharing of materials among a group of cooperating paysites. Referer spoofing is often used to gain free access to these paysites.
Read more about this topic: HTTP Referer
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“Working women today are trying to achieve in the work world what men have achieved all along—but men have always had the help of a woman at home who took care of all the other details of living! Today the working woman is also that woman at home, and without support services in the workplace and a respect for the work women do within and outside the home, the attempt to do both is taking its toll—on women, on men, and on our children.”
—Jeanne Elium (20th century)
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—Mary Kay Blakely (20th century)
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—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)