Black hat SEO: How to Avoid mistaken cheating on 404 pages

404 page is {
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} "> Web {
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} "> The server cannot retrieve {
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} "> When a webpage or directory is accessed, a prompt page is sent back to the browser. For example, when ie8.0 accesses an IIS, the returned information is:
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This page cannot be found
You are {
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} "> The search page may have been deleted, renamed, or temporarily unavailable.
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Please try the following operations:
Make sure that the spelling and format of the website address displayed in the address bar of the browser are correct.
If you have reached the webpage by clicking the link, contact the website administrator to inform them that the URL format is incorrect.
Click the back button to try another link.
HTTP Error 404 -{
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} "> The file or directory is not found.
Internet Information Service (IIS)
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{
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} "> Technical information (for technical support personnel)
Go to Microsoft Product Support and search for titles including "HTTP" and "404.
Open "IIS Help" (which can be accessed in the IIS Manager (inetmgr ), search for topics titled "website Settings", "Common Management Tasks", and "custom error messages.
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The information returned by Apache on the Web server is as follows:
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Not found
The requested URL /{
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} "> PhP5/DB /{
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} "> MySQL/SP/sp_test.php was not found on this server.
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The information returned by nginx on the Web server is as follows:
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404 not found
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Nginx/0.7.62
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However, Web servers, such as Apache and IIS, usually provide a custom function for the 404 error page. That is to say, you can specify a page. When a 404 error occurs, instead of returning the default 404 page of the web server, we specify this page. The purpose is to improve the user friendliness of the website.
Many people use this customizable 404 page to place some public information, such as the website's introduction text and even advertisements.
However, many people use this feature of web servers to cheat the search engine to achieve some personal purposes.
How can this problem be solved? First, he uploads several pages on the website, such as 1000, and then waits for the search engine to be indexed. After being indexed, he does not create new pages, but simply rename these pages. The page to be indexed is regarded as nonexistent because it is renamed. As a result, the website has 1000 dead links, which are directed to the 404 page by the Web server, for example, the advertisement page. The 1000 page after the name is changed may be indexed by the search engine again. In this way, although the website actually has only 1000 pages, the search engine will mistakenly think that there are many pages, because the search engine does not remove dead links and there is {
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} "> Time delay. Therefore, a website directs a large number of search results to a customized 404 page based on some webpages, resulting in a large number of repeated and invalid search engines. At first, many people clicked on the advertisement.
Later, this trick was used by the search engine {
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} "> Developers discovered that they passed {
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} "> The program determines this cheating method. However, because many Webmasters have such results due to website revisions and other reasons, sometimes the search engine misjudges them.
So the webmaster should be cautious with 404 page customization, especially when the website is revised.
Author: Zhang Qing (mesh) 2009-3-6
From mesh horizon: http://blog.why100000.com
"100,000 why" computer {
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} "> Learning: http://www.why100000.com

Original link: http://blog.why100000.com /? P = 718