Defending against DDoS attacks has become a top priority for network service providers. With the increase in Internet bandwidth and the continuous release of various DDoS hacking tools, the implementation of DDoS attacks has become easier and easier, and DDoS attacks are on the rise. Due to various factors such as commercial competition, retaliation, and network extortion, many network service providers such as IDC hosting computer rooms, commercial sites, game servers, and chat networks have been troubled by DDoS attacks for a long time.
Although it is also a denial of service attack, DDoS and DoS are different. The DDoS attack strategy focuses on sending a large number of seemingly legitimate network packets to the victim through many bot hosts (hosts that have been invaded or indirectly exploited by the attacker) , Resulting in network congestion or exhaustion of server resources, leading to denial of service. Once a distributed denial of service attack is implemented, attacking network packets will flood the victim host like a flood, thereby flooding legitimate users’ network packets and making legitimate users unable to Normal access to the server's network resources, therefore, denial of service attacks are also called flood attacks.
What are the main methods to defend against DDoS attacks?
1. It needs to be able to scan regularly.
To defend against DDoS attacks, it is necessary to be able to scan the existing network master nodes on a regular basis in order to be able to check out possible security vulnerabilities, especially for new vulnerabilities to be cleaned up in time; in many cases, the calculation of backbone nodes is due to higher bandwidth It is the best location for hackers to use, and it is very important to strengthen the security of these hosts themselves, and the main nodes connected to the network are often server-level computers, so regular vulnerability scanning also becomes more important.
2. It is necessary to be able to configure the relevant firewall on the backbone node.
Everyone knows that the firewall itself can defend against DDoS attacks and many other attacks. In practice, when it is discovered that it is attacked, it can directly direct the attack to some sacrificial hosts, which can effectively ensure that the real host is not directly attacked; but When guiding, you must choose some unimportant hosts or directly lead to some system hosts with excellent defenses.
3. Use more computers to withstand DDoS attacks.
In many cases, the effect of using this method is the best. When the user has more capacity and sufficient resources, it is very suitable to use this method. After all, the energy of hackers is gradually depleted in the attack, facing sufficient resources and capacity. Attackers often have no other methods available; but we need to remind everyone that using this method may waste a lot of money and even leave too many devices in an idle state.
Now that DDoS is becoming more and more rampant, anti-DDoS measures are very necessary for every company that is connected to the Internet. By doing DDoS protection, a lot of losses can be reduced and the normal operation of the company's business can be protected.
This article is from: https://www.zhuanqq.com/News/Industry/313.html