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Eka Sunucu DDoS protection Secure your website, applications and infrastructure against modern cyber threats with the guide. This comprehensive guide helps you understand DDoS attacks and develop effective protection strategies.
DDoS (Distributed Denial of Service); targeting servers, inaccessible and serious financial losses It is a common type of cyber attack that can lead to Be prepared against these threats with modern protection methods.
Advanced technologies that detect DDoS attacks early
Filters harmful traffic and ensures normal traffic continues
Absorbs attacks with large network capacity
Uninterrupted protection and professional technical support
DDoS (Distributed Denial of Service) is a type of organized cyber attack to make a website, online service, network or server inaccessible. In these attacks, attackers use a large number of computers (usually infected computer networks called "botnets") to send intense traffic to the target system, exceeding the capacity of the system and causing it to crash.
DDoS attacks can make a site or service inaccessible to normal users, resulting in the following effects:
Motivations for DDoS attacks can vary:
Attacks to damage rival companies or demand ransom
Attacks to send a message to an organization for political or ideological reasons
Performing a DDoS attack to disguise another cyber attack
Some attackers launch attacks just to show off their technical skills
DDoS attacks are divided into three main categories according to the system layer they target and the methods they use. Each type of attack uses different techniques and requires different defense mechanisms. Understanding these attack types is crucial to creating an effective protection strategy.
These are attacks that aim to consume network bandwidth. They fill the target system's bandwidth, preventing normal traffic from being transmitted.
These are attacks that aim to consume server resources and connection tables. It targets the server's resources such as processor and memory.
They are complex attacks that target the web application itself, often achieving more effective results using less traffic.
| feature | Volumetric Attacks | Protocol Attacks | Application Layer Attacks |
|---|---|---|---|
| Hedef | Bandwidth | Server Resources | Web Application |
| scale | Very High (Tbps) | Orta (Gbps) | Low (Mbps) |
| Detection Difficulty | Easy | Orta | Zor |
| Effect Rate | fast | Orta | slow |
| Protection Method | Traffic Filtering, Distribution | Case Study, Rate Limiting | Behavior Analysis, WAF |
Effective DDoS protection requires a layered security approach. No single solution can provide complete protection against all types of DDoS attacks. Therefore, it is important to use a combination of various defense mechanisms against different attack vectors.
One of the most basic defense mechanisms against DDoS attacks is to increase the capacity of your network to a level that can handle the attack. This approach is also known as "traffic absorption".
Traffic filtering is systems that detect and block harmful traffic while allowing legitimate traffic to pass. This filtering can be done at the network edge or by DDoS protection services.
Load balancing prevents a single server from being overloaded by distributing incoming traffic among multiple servers. This approach makes your service more resilient.
Special hardware that protects against DDoS attacks analyzes network traffic, detects and filters abnormal traffic.
Cloud-based DDoS protection services clean the traffic by passing it through its own infrastructure and forward only safe traffic to target servers. These services often have large network capacities and provide protection against various types of attacks.
| Protection Type | event | Cost | Installation |
|---|---|---|---|
| ISP Protection | high | Zor | |
| On-Premise Solutions | Very High | complicated | |
| Cloud Solutions | Orta | Easy | |
| Hybrid Protection | high | Orta |
In 2016 , the attack on the famous DNS provider Dyn, which affected many large websites and made a significant part of the internet inaccessible, occurred with 1.2 Tbps of traffic per second.
However, during the same period, a gaming company that suffered a similar magnitude of attack was able to return to normal operations within 30 minutes thanks to a multi-layered DDoS protection strategy. The protection strategy they used included:
Precautions that can be taken against DDoS attacks should be considered in three stages: pre-attack preparation, intervention during the attack and post-attack evaluation. The following measures include basic protection strategies that businesses of all sizes can implement.
Turkey (Turkish)
Germany (German)
Worldwide (English)
http {
# Rate limiting zone tanımı
limit_req_zone $binary_remote_addr zone=one:10m rate=1r/s;
server {
listen 80;
server_name example.com;
location / {
# Bu lokasyona erişim for saniyede 1 istek limiti, 5 istek kuyrukta bekleyebilir
limit_req zone=one burst=5 nodelay;
# Normal sunucu ayarları
proxy_pass http://backend;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
}
# API istekleri for daha sıkı limit
location /api/ {
limit_req zone=one burst=2 nodelay;
proxy_pass http://api_backend;
}
}
}Professional solutions are often required to protect against large-scale DDoS attacks. These solutions have the ability to detect and filter malicious traffic by passing the traffic through the scrubbing center. Below you can find information about the leading DDoS protection solutions on the market.
Cloud-based solutions clear traffic by routing it through the service provider's large-capacity network. These solutions are popular because they require minimal hardware investment and offer quick installation.
Cloudflare protects against volumetric, protocol and application layer attacks with its extensive global network. It offers both free and premium plans and is simple to set up.
Akamai Prolexic offers enterprise-grade DDoS protection. This service, which comes with a 24/7 monitoring and response team, provides effective protection against even the largest and most complex attacks.
Ideal for businesses using AWS infrastructure, AWS Shield does not require additional fees for the standard plan. The Advanced plan provides more advanced protection against large-scale and complex attacks.
On-premise solutions are hardware or software-based protection systems positioned within the organization's own network. These solutions are suitable for businesses with high data sensitivity or regulatory requirements.
Radware DefensePro detects and blocks abnormal traffic on the network using behavior-based and machine learning algorithms. It is especially preferred by financial institutions and large businesses.
F5 BIG-IP provides comprehensive protection against both network and application layer attacks. Hardware-accelerated packet processing delivers high-performance DDoS mitigation.
Imperva provides strong protection against application layer attacks with integrated bot protection and CDN features. 3 offers rapid intervention with its ability to initiate mitigation in less than a second.
Hybrid solutions combine on-premise and cloud-based protection mechanisms, allowing you to reap the benefits of both approaches. These solutions provide the most comprehensive protection but generally cost more.
Neustar UltraDDoS Protect provides hybrid protection with a combination of on-site equipment and cloud-based cleanup centers. This approach ensures optimal performance by resolving small attacks on-premises while redirecting large attacks to the cloud.
| feature | Cloud Based | On-Premise | hybrid |
|---|---|---|---|
| Installation Time | fast | slow | Orta |
| Startup Cost | low | high | high |
| Scalability | high | limited | high |
| L3/L4 Protection | excellent | good | excellent |
| L7 Protection | good | excellent | excellent |
| Data Privacy | low | high | Orta |
| Delay Time | Orta | low | Orta |
| Maintenance Need | low | high | Orta |
"After switching to our hybrid DDoS protection strategy, we can effectively manage both small and large-scale attacks. Thanks to our on-site solution, we can instantly block small attacks, while automatically switching to cloud protection when the attack exceeds our capacity. Thanks to this strategy, we have not experienced any interruption in the 12 major attack we have experienced in the last year."
Once a DDoS attack has been recovered, a series of actions must be taken to restore systems and better prepare for future attacks. The steps below provide a comprehensive roadmap to follow after a DDoS attack.
Once the attack is over, make sure all systems and services are working normally:
Gather as much information as possible about the nature, magnitude and effects of the attack:
Create a transparent communication strategy and inform relevant parties:
Identify weak points and defense deficiencies that arise during the attack:
Revise your response plan based on what you learned from the attack:
Make technical improvements to strengthen your defenses against future attacks:
Get your team better prepared for future attacks:
Create comprehensive documentation about the attack:
"The post-DDoS attack process is not just about restoring systems to their normal state, but also about becoming stronger against future attacks. Every attack is a learning opportunity to strengthen your security strategy and infrastructure." - Cyber Security Expert
While DoS (Denial of Service) attacks come from a single source, DDoS (Distributed Denial of Service) attacks are carried out simultaneously from multiple sources. DDoS attacks are generally larger in scale and harder to block.
You may see symptoms of abnormal slowdown in your systems, inaccessibility of your website, difficulty accessing certain services, abnormal traffic increase and resource consumption. Your monitoring tools can also alert you to abnormal traffic patterns.
Free or budget plans from CDN services like Cloudflare can provide cost-effective DDoS protection for small and medium-sized businesses. In addition, configuration-based measures such as basic rate limiting and traffic filtering can also be implemented without requiring extra hardware.
First, verify the situation and try to determine the source and type of attack. If you have a DDoS response plan in place, start implementing it now. Contact your ISP or DDoS protection provider. If necessary, take immediate measures to route or filter traffic. Finally, keep detailed records throughout the incident.
DDoS attacks can be pursued legally and are considered serious crimes in many countries. However, attackers are often difficult to detect because attacks are carried out through large numbers of zombie computers (botnets). In case of a serious attack, it is recommended that you contact law enforcement and cybercrime units.