When it comes to hanging black links, many people may associate it with hanging horses. In fact, the two are the same thing. They both tamper with the program code by invading the website, but the modified content is different. As the name suggests, a Trojan horse is a Trojan horse. Everyone knows that a Trojan horse is actually a virus, which naturally causes varying degrees of harm to computers or websites. I used to have a corporate website that was hit by a Trojan horse every three days. Every time I opened it, it would Automatically run a script program to slow down the computer to the slowest speed. Then the computer freezes instantly and the browser crashes. It takes at least five minutes for the computer to start to respond. It would be the first time for someone else to come across this kind of website. Even if I'm beaten to death, I won't do it a second time.
The following is based on my experience of several websites being linked to black links and horse tags (since black links and horse tags are essentially the same thing, here I will take black links as an example) to analyze how we can detect whether our website has been hacked. What about the black chain?
1. The website performs abnormally in search engines. This is specifically reflected in website inclusion, Baidu snapshot updates, and keyword rankings. You may think that Baidu updates can also cause these behaviors, but if there are no problems with the external links of your website content, it will generally not be the case after the update. , if the quality of your website content and external links have declined, it is reasonable for your website to perform abnormally after the update.
2. Check whether there are abnormal codes in the website source program. Black links generally involve adding a large series of hidden links to the homepage. These links cannot be seen in the front desk. On the surface, you may not see signs that your website has been linked to black links, but that does not mean that your website has not been compromised. No matter how hard you try, you don't know that as soon as you check the source code, there will be a surprise waiting for you.
3. Check whether there are any abnormal links in friendly links. For SEO friends, checking friendly links should be commonplace, because they often check whether any website in the friendship has been demoted or K-ed. If you check for abnormal links, or the number of friendly links you check suddenly increases. Many, then these links that pop up suddenly are likely to be black links.
4. Check the modification time of website pages. Everyone knows that when you create a new file or edit a file on your computer, the last edited time will be displayed. The same is true for websites. Generally, the last edited time of a page file is the time you last uploaded it. If it has not been modified after uploading, then all The last modification date of the page should be the same day. You can use the FTP tool or enter the virtual host management background to enter webftp to check the modification time of the page. If there is any abnormality, it means that your website files have been modified.
Now that we know how the website was blacklinked, the solution is just to prescribe the right medicine:
1. Observe the performance of the website in search engines;
2. Check more website source codes;
3. Develop the habit of frequently checking friendly links or dead links;
4. Modify website permissions or change FTP passwords from time to time;
5. If your website does not specify a description, then you need to pay more attention to the content captured by the snapshot page. Maybe the captured content contains black-linked content, which is what I encountered this time;
6. If it is a site with a shared IP, you need to regularly check whether the site under the same IP is normal. It is best to use an independent IP to minimize unnecessary interference.
Black links are a big blow to people who do SEO. After a lot of effort, you have a black link on your website, and you are suddenly given a black link, which makes you suffer. If it is mild, it may be a temporary reduction in authority, but if it is serious, it may be a temporary reduction in authority. If you click on it, you will be K directly. It is not easy to make a website and you need to grasp it carefully.
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