In recent years, with the rapid development of Internet technology, there have been more and more network attacks. Anti-DDoS should not be underestimated. The current DDoS can directly block the service, which is enough to combat the attacked by affecting the customer experience of the service. The cause of the attack may be blackmail by hackers, or malicious competition from opponents. In particular, industries such as finance, e-commerce, and gaming are most likely to be attacked by DDoS.
Typical consequences of a server being attacked by ddos:
First: Server CPU and bandwidth are occupied a lot.
DDoS attacks are actually a malicious resource-occupying attack. CPU and bandwidth resources are usually one of the main methods of DDoS attacks. The attacker uses broiler or attack software to send a large amount to the target server. Invalid requests cause a large amount of server resources to be occupied, so normal processes are not effectively processed, so the website will open slowly.
Second: cause network paralysis
By controlling a large number of attacking hosts to connect to the website ports at the same time, a large flow of useless data is created, causing network congestion to the attacked host, making the attacked host unable to communicate with the outside world normally. The server cannot be connected and the website cannot be opened.
Third: the domain name cannot ping the IP
If the domain name does not ping the IP, webmasters may not think about it. This is actually a manifestation of a DDoS attack, but the attack target is the DNS domain name server of the website. When this kind of attack occurs, the IP of the ping server is normally connected, but the website cannot be opened normally, and the pinging of the domain name will not work normally.
From the above description, everyone should know how harmful the traffic attack is. What should I do if the server is attacked by DDoS? What methods can be used to quickly prevent DDoS? Here are a few commonly used methods:
1. Use distributed cluster defense
DDOS stands for Distributed Denial of Service, even the name is so similar. Distributed cluster defense is to deploy the website system on a large number of servers in a distributed manner to directly disperse the attacker's traffic. A single cluster defense exceeds 10G, which can effectively prevent DDoS.
2. Use a hardware firewall
The attacked server is connected to the hardware firewall, and the hardware is used for defense. Like the high-defense servers on the market, it is an independent single hard defense 10G, 20G, 30G, which is suitable for small traffic ddos attacks of tens of G, and many hard defenses are currently combined. Can not effectively protect against CC attacks.
Three, use high-defense CDN
High-defense CDN is an upgraded version of CDN. In addition to the function of quickly distributing information through multiple nodes, it also has powerful defense capabilities. It achieves the purpose of protection by hiding the source site IP.
Fourth, rent a large bandwidth hard resistance
Nowadays, DDOS attacks are often hundreds of gigabytes, and more than T occur from time to time during peak hours. The cheapest bandwidth, 10M is about 100. To prevent T-level attacks, the monthly rent is about 100,000. Few people choose this method to prevent DDoS. Although bandwidth resistance is good, it is expensive, and it is suitable for large-scale enterprises with large businesses and small and medium-sized enterprises cannot afford it.
Preventing DDoS attacks is of great importance, because it is not only choosing which security vendor to provide services, but also seeking a guarantee for the normal operation of a company’s business and a guarantee for the survival of a company. With the rapid development of the Internet today, Internet companies are facing fierce market competition. They not only have to bear more expensive traffic costs, but also face competitive pressures from technologies, products, brands, marketing, and talents. It has become increasingly difficult to break through in the market.
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