It is also common for websites to be attacked maliciously, especially for some personal or small websites. Since there are no professional technical personnel to maintain them, once they are attacked, they are helpless. The so-called website attack generally refers to a network attack. A network attack is an attack on the software, hardware and data in the network by using the loopholes or security defects in the network, so that the website cannot be opened or various abnormal problems occur, resulting in a decline in the website ranking, or even Penalized by search engines. What should we do if the website is attacked? Let me introduce it to you.
First of all, we need to understand the symptoms of a website being attacked. Generally, there will be DDOS, CC attacks, and even snapshot hijacking, etc., which will cause the website to fail to open, or jump to an unknown website after opening. Is the website ranking good for the webmaster? It's easy to go up, what is waiting is not a substantial increase in traffic, but an inexplicable attack from an unknown source. DDOS is the abbreviation of Distributed Denial of Service in English, which means "distributed denial of service". The Chinese name of DDOS is distributed denial of service attack, commonly known as flood attack. There are many kinds of DDOS attack methods, the most basic DDOS attack is to use reasonable service requests to occupy too many service resources, so that legitimate users cannot get service responses. The principle of the DDOS attack is actually that hackers invade many servers and computers and send large traffic requests to our website web server to block our port 80, causing users to be unable to access normally. CC attacks are mainly used to attack pages. I believe that everyone should have such an experience, that is, when visiting a forum, if the forum is relatively large and there are many visitors, the speed of opening the page will be slower. The more visitors, the more pages of the forum, the database The greater the pressure, the higher the frequency of access, and the occupied system resources are considerable. The principle of the CC attack is that the attacker simulates multiple users (as many threads as the number of users) to continuously access pages that require a large amount of data operations (that is, a large amount of CPU time), resulting in a waste of server resources, and the CPU is at 100 for a long time. %, there will always be unfinished connections until the network is congested and normal access is suspended.
Let me first talk about what is a CC attack:
CC attack is a type of DDOS (Distributed Denial of Service). A large number of proxy servers are used to initiate a large number of connections to the target computer, resulting in the exhaustion of target server resources and denial of service
CC attackers often visit a certain page frequently. This page is very special. When using this page, it will occupy more server resources (bandwidth or CPU). Frequent visits to this page** often lead to inaccessibility of the website even server down
The principle of CC attack is that the attacker controls some hosts to send a large number of data packets to the other server continuously, causing the server resources to be exhausted until it crashes.
The first feeling when you log on to the client server is: card, special card! Look at the monitoring information, the CPU has soared to 100% and it has lasted for more than half an hour
Look at the website access log, different IPs keep visiting the same page, up to a hundred times per second, and there are a lot of database search operations on the page, no wonder the website crashed. CC attack is undoubtedly, it is really scary
It looks like it's targeted, it automatically fills in the plot of TV dramas...
Today, Xiaoyi Cloud Security will tell you about the server being maliciously attacked by ddos, and the home page will tell you about my friend’s personal experience. I have a friend who started a game company. In recent years, games have become an indispensable part of everyone's life. My friend's platform is also developing well.
Until a few days ago, he encountered big trouble, the website was attacked, and the IP of the source site seemed to be exposed. Over the past year, his platform has been operating pretty well, maybe because the traffic is getting higher and higher. He always thought that there would not be so many boring people coming to trouble him.
Then he changed to Anti-Defense IP product, because he had been using Alibaba Cloud server before, and the IP of the source site had been exposed. He changed the IP of the source site, and helped him check and eliminate possible exposure factors of the IP of the source site, whether there was source code information leakage, whether there were some malicious scanning situations, checking DNS resolution configuration, and so on.
After all, my friend is not a professional. In the past, most of the cyber attacks were random, but now more and more cyber attacks are often aimed at a company or a department or a smaller part. Ant Cloud security professionals pointed out: Attackers often bring down websites that have no direct conflict with them, and their purpose is only to expand the impact on third-party targets. Choosing an attack-proof server allows you to completely avoid this sudden attack.
Network attacks often only need to go through some delicate procedures to attack. These attacks operate within the normal threshold of an application or application server's activity, making it difficult for threshold-based detection tools to detect it.
Generally speaking, high-defense IP plays a very important role and significance for the successful operation and development of enterprise websites. Enterprises have high-defense IP, which is a kind of security guarantee for the enterprise itself. Then at my suggestion, he changed the IP of the origin site and used Anti-Defense products.
Ant Cloud Security recommends that you:
1. Choose the right defense
The choice of server should be based on your own cost, the daily attack situation, and the configuration of the model. Combined considerations, it is best to choose a computer room that can upgrade the defense in the future, so that if the defense selected at the beginning is not enough, you can apply to upgrade the defense later. Saved a lot of trouble.
2. Server stability
To ensure 7 * 24 hours of non-stop operation, to ensure the normal operation of all websites, security issues, hardware defense, software defense, and resist malicious hacker attacks.
So which industries are suitable for high-defense IP? Ant Cloud Security recommends that you:
Corporate website
The stability of the website is a crucial factor, and it is no exception for corporate websites. Customers will learn about the company's information through the website. If there are some problems on the website, which makes the website inaccessible, this will affect the user's bad impression of the company. Therefore, for some large enterprises, high-defense IP is a very good choice, which can defend against many network attacks and ensure the normal opening and access of websites. It is very helpful to improve the user experience.
game industry
Today's hottest industry is the game industry. Many customer groups are playing games. Web games, mobile games, etc. are all types that users love. However, with the fierce competition, many game providers will suffer from network attacks. In severe cases, a game will not be accessed at all, which will bring a lot of trouble to game service providers. Love is evident. It can not only prevent malicious competition among peers, but also prevent network attacks on the Internet.
Financial sector
Data security in the financial industry is very important. Once attacked, it will cause great economic losses. Therefore, in today's era of frequent network attacks, high-defense IP has become the most ideal choice.
video industry
In addition to high requirements for server configuration in the video industry, it is also very important for server security. There are a lot of customer information in the video industry, and once attacked, the loss will be huge, so the high-defense IP has become the server that many video practitioners prioritize.