Preventing DDoS Attacks: 5 Tips to Keep Your Website Secure

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Experiencing a Distributed Denial of Service (DDoS) attack can result in significant disasters. According to Cloudflare, the average cost for an organization dealing with a successful DDoS attack is approximately $100,000 per hour. This emphasizes the vital importance of preventing such attacks from occurring.

Beyond immediate financial costs, there are long-term consequences such as damage to reputation, harm to brand image, and the loss of customers. Consequently, investing substantial resources in preventing DDoS attacks, or at least minimizing the risk of becoming a victim, is far more sensible than solely focusing on stopping an ongoing attack.

Understanding DDoS Attacks

DDoS attacks involve overwhelming a target with malicious traffic from multiple sources, all coordinated from a central point. This distributed nature makes preventing DDoS attacks significantly more challenging compared to thwarting DoS attacks originating from a single IP address.

Another challenge in preventing DDoS attacks is the prevalence of "amplification" attacks. These involve sending small data packets to poorly configured servers worldwide, causing these servers to respond with much larger packets to the targeted server. For instance, a 60-byte DNS request could result in a 4,000-byte response—an amplification factor of about 70 times the original packet size.

Hackers have exploited server features like memcache, launching amplified memcached attacks. For example, a 15-byte request can yield a 750 kb response—amplification exceeding 50,000 times the original packet size. The largest DDoS attack, hitting Github in early 2018, peaked at 1.35 Tbps data through an amplified memcached attack.

The advantage for attackers in amplification attacks is the ability to launch far larger assaults using limited bandwidth compared to direct attacks on victims.

5 Ways to Prevent DDoS Attacks

  1. Establish Redundancy in Your Infrastructure: Create redundancy across multiple data centers with robust load balancing systems to distribute traffic. Geographically distributing servers makes it harder for attackers to impact all servers simultaneously.

  2. Configure Network Hardware Against DDoS Attacks: Make simple hardware configuration changes like firewall adjustments to block certain incoming packets (e.g., ICMP or DNS responses from external networks) to prevent volumetric DNS-based attacks and specific pings.

  3. Utilize Hardware and Software Anti-DDoS Solutions: Employ network firewalls, web application firewalls, and potentially load balancers. Some hardware vendors offer software protection against DDoS protocols by monitoring incomplete connections and flushing them based on configurable thresholds.

  4. Use DDoS Protection Tools: Several security vendors provide tools designed to block DDoS attacks before they enter your network. These tools analyze traffic behavior and block abnormal traffic or known attack signatures.

  5. Secure Your DNS Servers: Protect your web server from DDoS attacks by safeguarding your DNS server. Consider redundancy, placing them in different data centers behind load balancers, or opting for cloud-based DNS providers designed explicitly for DDoS prevention.


Understanding and implementing measures to prevent DDoS attacks are crucial for safeguarding your servers and websites against the potentially devastating impacts of these threats.

People Also Ask (PAA):

What is the best way to stop a DDoS attack?

Implementing a combination of strategies like building infrastructure redundancy, configuring network hardware, utilizing anti-DDoS solutions, employing protection tools, and securing DNS servers is the best approach to thwart DDoS attacks.

How long do DDoS attacks last?

DDoS attack durations vary, but they can last from minutes to hours or even days, depending on the attacker's intent and resources.

What are the common targets of DDoS attacks?

Common targets of DDoS attacks include websites, online services, gaming servers, financial institutions, and government networks.

About the Author

Ordinary People

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