Ddos Attack Today: Meaning, Types and Protection Methods

How Secure is Your Business? From a high level, a distributed denial-of-service (DDoS) attack is like a traffic jam clogging up a highway, preventing regular traffic from arriving at its desired destination. A DDoS attack is a malicious attempt to disrupt the normal traffic of a server, service or network by overwhelming the target or its surrounding infrastructure with a flood of internet traffic. DDoS attacks achieve effectiveness by utilizing many compromised computer systems as sources of attack traffic. Prevention is better than a cure. That’s why we always take a proactive approach towards cybersecurity.

What is DDoS Protection?
For enterprises, DDoS Protection system often requires a lot of network equipment and large network bandwidth purchases, and the website also needs to be modified accordingly, and relevant personnel are also required to maintain it. After the project is completed, can it be resisted? Live external attacks may still be unknown. The defense against DDOS attacks should comprehensively consider the construction of a multi-level, multi-angle, and multi-structured security protection system based on BGP-based traffic cleaning technology, and the construction of active defense, security emergency, security management, physical security, and data disaster tolerance. Start with the system to integrate "high defense server", "high defense smart DNS", "high defense server cluster", "cluster firewall architecture", "network monitoring system", and "high defense intelligent routing system" to achieve intelligent, complete and rapid response The “one-line” security protection architecture of the mechanism.

What are common types of DDoS attacks?
Application layer attacks
Also known as a Layer 7 DDoS attack, the goal is to exhaust the resources of the victim by targeting the layer where web pages are generated on the server. The attack is then delivered to visitors in response to HTTP requests — that is, the application layer. Layer 7 attacks are challenging, because the traffic can be difficult to identify as malicious.
Protocol attacks
Protocol attacks utilize weaknesses in Layer 3 and Layer 4 of the ISO protocol stack to render the target inaccessible. These attacks, also known as a state-exhaustion attacks, cause a service disruption by consuming all available 'state table' capacity of web application servers, or intermediate resources, such as firewalls and load balancers.
Volumetric attacks
This category of attacks attempts to create congestion by consuming all available bandwidth between the target and the wider internet. Large amounts of data are sent to a target using a form of amplification, or by other means of creating massive traffic, such as requests from a botnet.

Brief introduction to DDOS Protection methods
1. Cleaning and filtering of abnormal traffic:
Through DDOS hardware firewall cleaning and filtering of abnormal traffic, through the rule filtering of data packets, data flow fingerprint detection and filtering, and data packet content customization filtering and other top technologies, it can accurately determine whether the external access traffic is normal or not, and further prohibit the filtering of abnormal traffic. A single load can defend 8-9.27 million syn attack packets per second.
2. Distributed cluster defense:
This is the most effective way for the network security community to defend against large-scale DDOS attacks. The characteristic of distributed cluster defense is to configure multiple IP addresses on each node server, and each node can withstand DDOS attacks of no less than 10G. If a node is attacked and cannot provide services, the system will automatically switch according to the priority setting Another node returns all the attacker's data packets to the sending point, making the attack source paralyzed, and affecting the company's security execution decisions from a more in-depth security protection perspective.
3. High defense intelligent DNS resolution:
The perfect combination of high-intelligence DNS resolution system and DDOS defense system provides enterprises with super detection functions against emerging security threats. It subverts the traditional practice of one domain name corresponding to one mirror, and intelligently resolves DNS resolution requests to servers on the user's network according to the user's Internet route. At the same time, the intelligent DNS resolution system also has a downtime detection function, which can intelligently replace the paralyzed server IP with a normal server IP at any time, so as to maintain a never-downtime service state for the enterprise network.