Today's Distributed Denial of Service (DDoS) attacks are very different from attacks of this type that were carried out a few years ago, when most of them were simple massive requests designed to sow confusion and cause a short interruption to the site or organization. The motives for attacks are becoming more sophisticated, the methods are becoming more sophisticated, and the frequency of attacks is growing exponentially. This is especially true in light of automated attacks, which allow attackers to switch attacks faster than any traditional IT security solution can respond.
The combination of size, frequency and duration of today's attacks presents a significant security and availability challenge for any networked organization. Minutes or even tens of minutes of downtime or delays significantly impact the provision of basic services. When you combine these factors, victims face a significant security and service availability issue. Below are seven dos and don'ts to keep your network safe from DDoS attacks.
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Develop a response plan DDoS -ataki
These resiliency plans should include technical competencies as well as a comprehensive plan that describes how to continue business operations in the face of a successful DDoS attack. The incident response team should establish and document methods of communication with the business, including key decision makers, throughout the organization to ensure that key stakeholders are notified and consulted as appropriate.
Recognize DDoS activity
Large and massive DDoS attacks are not the only form of DDoS activity. Hackers usually launch short-term local attacks to stress test your network and find vulnerabilities within your security perimeter. Understand network traffic patterns and look for DDoS mitigation solutions that identify DDoS traffic in real time and immediately remove major and minor DDoS attacks.
Don't think the problem is just large-scale volumetric attacks
DDoS attacksAttackers are becoming more and more cunning, their goal is not only to harm a website, but also to distract IT security staff with low bandwidth. For example, a short-term DDoS attack is a smokescreen for more dangerous network intrusions such as ransomware. Such attacks are usually short-lived (less than 5 minutes) and are local in nature, which means they can easily slip out of sight of the radar without being detected or stopped by a traffic monitor or even some DDoS protection systems.
Don't rely on traffic monitoring or thresholds
Sure, you can spot jumps in traffic, but can you tell good traffic from bad traffic? What would you do if you saw a surge in network activity? Can you only block bad traffic, or will your network resources be overloaded anyway? Monitoring your traffic and setting thresholds is not a form of defense, especially when you consider that small under-saturation attacks often go unnoticed due to high trigger threshold values.
Don't rely on IPS or firewall
Neither an intrusion prevention system (IPS) nor a firewall will protect you. Even a firewall that claims to have built-in DDoS protection capabilities has only one method of blocking attacks: the use of non-selective thresholds. When the threshold is reached, every application and every user using that port is blocked, resulting in a shutdown. Attackers know that this is an effective way to block legitimate users along with attackers. As this affects the availability of the network and applications, the ultimate goal of denial of service is ultimately achieved.
DDoS attacksContact your security vendor
Many ISPs today offer DDoS Defense Plans as either a value-added or premium service. Find out if your ISP offers free or paid DDoS protection plans. But contact your ISP long before you get attacked; if you don't have DDoS protection and are already under attack, your ISP probably won't be able to immediately register you and then block DDoS traffic to your site. Alternatively, you can purchase an on-premises or virtual DDoS protection product.
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DDoS protection has a variety of deployment options; through a local DDoS protection appliance or virtual machine (VM). Be sure to look for extensive real-time DDoS security event analytics and reports.
Combine time to mitigate risks with successful defense against attacks
When you develop a resiliency plan and choose a DDoS mitigation method, time to remediation should be a critical factor in your decision making process. Remember, DDoS Protection Services can be a useful addition to an automated DDoS protection solution. However, a remediation service alone is not enough because:
Before a service can be invoked, someone or something - a computer or a person - must detect an ongoing DDoS attack.
redirecting "bad" traffic takes 20-30 minutes, thereby allowing more serious security breaches to occur during this time. During a DDoS attack, timing is of the essence. Whether it's waiting for several minutes, tens of minutes, or even more time to eliminate the consequences of a DDoS attack, this is not enough to ensure the availability or security of services.