Several manifestations of website hacking:
1. Links
The so-called black chain is mostly set so that users can not see the page when opening the page with a browser, but it can be caught when the spider program of the search engine crawls. profit.
It is very difficult to find such situations if the webmasters are not paying attention. The main methods of hiding links are as follows:
A. Use the label display in css to set the display element of the black chain to none, and it will not be displayed on the page.
B. Use the color element in css to adjust the display color of the label of the black chain to be the same as the color of the web page.
C. Use the floating or positioning technology of CSS to float or position the black chain in a position where the web page cannot be browsed.
2. Search engine cheating
Add a piece of code to distinguish ordinary users from search engines through the UserAgent attribute of the visitor. When a normal ordinary user visits, they see a normal page. However, spiders targeting search engines return any customized page content to deceive search engines. Use the high weight of hacked websites to quickly achieve the effect of keyword ranking in the forefront of search engine rankings.
3. Ordinary user deception (malicious jump)
Add a jump code to the page, and when the user clicks to visit, it will automatically jump to the specified page. Use the large traffic of the hacked website to achieve the effect of quickly attracting a large number of users.
4. Add page file
It does not tamper with the webpage files, but generates a large number of pages, and uses the high weight of the hacked website to quickly achieve the effect of keyword ranking.
5. Data leakage
Through the obtained server permissions, the website database is downloaded to achieve the purpose of data theft.
The above are some of the common forms of website hacking summarized by the author. If you have the above characteristics, please diagnose the website immediately and adjust it in time to avoid being punished by search engines and encountering the risk of being demoted.