Dedicated server with DDoS protection: how to choose and how much it costs

Choosing a dedicated server with DDoS protection depends on the type and volume of potential attacks (L3/L4 or L7, up to hundreds of Gbps), and the cost varies from $50 to $500+ per month, depending on the server's power and the level of protection offered.

What is a DDoS Attack and Why Do You Need a Dedicated Server with DDoS Protection?

A DDoS (Distributed Denial of Service) attack is a malicious attempt to make an online service unavailable to its users by overwhelming the target server, network, or application with a massive volume of traffic from multiple sources. If your project generates significant traffic, is popular, or is business-critical, then a DDoS protected server becomes not just an option, but a necessity.

The goals of DDoS attacks can vary: from extortion and competitive rivalry to political protest or simply vandalism. The consequences, however, are always the same — service downtime, loss of customers, reputational and financial costs. Dedicated servers, especially those used for hosting gaming projects, large online stores, or streaming platforms, often become targets due to their high bandwidth and direct internet access.

Types of DDoS Protection: L3/L4 vs L7 and When to Apply Which for an Anti-DDoS Server?

DDoS attacks differ by the layers of the OSI network model, and an effective anti-DDoS server must be able to withstand them at various levels. The main categories of protection are: L3/L4 (network and transport layers) and L7 (application layer).

L3/L4 Protection (Network and Transport Layers)

This is the most common type of protection, aimed at blocking volumetric attacks that overload network infrastructure. L3/L4 attacks include:

• Volumetric Attacks: SYN flood, UDP flood, ICMP flood. Their goal is to exhaust the server's communication channel bandwidth. Protection at this level acts as a powerful filter, sifting out anomalous traffic at the provider's network edge.
• Protocol Attacks: Attacks exploiting protocol vulnerabilities, such as TCP SYN-ACK flood.

Providers of DDoS protection hosting typically offer basic L3/L4 protection, which handles most medium-power volumetric attacks.

L7 Protection (Application Layer)

Application-layer attacks are more complex and require deep traffic inspection, as they mimic legitimate user requests. The goal of such attacks is to exhaust the resources of the application or server itself (CPU, RAM, disk I/O). Examples:

• HTTP flood: Numerous requests to a web server, mimicking normal user behavior.
• Slowloris: Slow attacks that keep connections open, exhausting server limits.
• API Attacks: Targeted requests to vulnerable API endpoints.

L7 protection is more resource-intensive and often includes technologies like Web Application Firewall (WAF), JavaScript challenges, CAPTCHAs, and user behavior analysis. It is critically important for websites with high-value data, such as online stores or banking services.

How Many Gbps Should DDoS Protection Hosting Cover?

The volume of DDoS attacks is constantly growing. While a few years ago, an attack of 10-20 Gbps was considered large, today attacks of hundreds of Gbps and even Tbps are common. When choosing DDoS protection hosting, it's important to understand the protection bandwidth offered by the provider.

For most small and medium-sized projects, protection capable of withstanding attacks up to 50-100 Gbps is sufficient. However, if you manage a large gaming server (e.g., a server for game hosting), a popular web service, or a CDN (which often use dedicated servers with a 10 Gbps port), you might need protection with a bandwidth of 200 Gbps, 500 Gbps, or even 1 Tbps+. Modern providers offer solutions with capacities up to several Tbps, utilizing global traffic scrubbing networks.

It's important not to confuse the protection's bandwidth with your server's port bandwidth. Protection operates at the provider's network level, filtering out malicious traffic before it reaches your server.

Free vs. Premium DDoS Protection: What's the Difference and What to Choose for a DDoS Mitigation Server?

Many hosting providers offer basic DDoS protection, often included in the plan's cost. However, serious projects may require premium protection. The differences are significant:

The choice between free and premium protection depends on the criticality of your service. If a few hours of downtime is not a disaster, basic protection might be sufficient. But for business-critical applications where every minute of downtime means direct losses, investing in a premium DDoS mitigation server is justified.

How to Choose a Provider and a Server with DDoS Protection?

Choosing the right provider for a server with DDoS protection requires attention to several key aspects:

1. Capacity and Type of Protection: Ensure that the provider offers protection commensurate with potential threats. For web applications, this should be L7 protection; for gaming servers, powerful L3/L4.
2. Geography of Scrubbing Centers: The more globally distributed traffic scrubbing centers there are, the faster and more effectively an attack will be repelled, and the less latency there will be for legitimate users.
3. SLA and Reputation: Review the Service Level Agreement. What guarantees does the provider offer? Read reviews about their ability to withstand attacks.
4. Configuration Flexibility: The ability to fine-tune filtering rules, IP address whitelists and blacklists, and threshold values.
5. Integration: How easily can the protection be integrated with your current infrastructure? Does it require changing IP addresses or DNS records?
6. Cost: Compare the prices of DDoS protection services in conjunction with the price of the dedicated server itself. Sometimes, a comprehensive solution is more advantageous.
7. Trial Period: Some providers offer a trial period or the opportunity to "pilot" the protection. Take advantage of this.

Valebyte offers dedicated servers with integrated DDoS protection, ensuring stable operation for your projects even under load. Our solutions include protection at both L3/L4 and L7 levels, with bandwidth sufficient to withstand most modern threats.

How Much Does a Dedicated Server with DDoS Protection Cost? Price Overview

The cost of a dedicated server with DDoS protection is formed from several components:

• Base Price of a Dedicated Server: Depends on hardware characteristics (CPU, RAM, SSD/NVMe drives, network port). A basic budget dedicated server can cost from $30-50/month.
• DDoS Protection Level:
  • Basic L3/L4 Protection: Often included in the plan's cost or added for a small fee ($10-30/month). It usually covers attacks up to 20-50 Gbps.
  • Advanced L3/L4 Protection: For larger volumes (up to 100-200 Gbps), it can cost an additional $50-150/month.
  • Premium L7 + L3/L4 Protection: The most expensive option, including deep traffic inspection and high bandwidth (hundreds of Gbps and higher). The cost can range from $150 to $500+ per month, depending on the provider and the required level of protection.
• Additional Options: Dedicated IP address, backup, managed services, geographical location of the server (e.g., a dedicated server in Germany) also affect the final price.

Thus, a full-fledged DDoS protected server for a serious project can cost from $100-150 to $700-1000+ per month. It's important to get a detailed offer from the provider to understand what you are paying for.

Practical Tips for Enhancing Protection on Your Anti-DDoS Server

Even with excellent external protection from the provider, internal optimization of your anti-DDoS server plays a key role:

1. Network Settings Optimization: Configure Linux kernel parameters for better handling of network connections.
2. Firewall Configuration (iptables/ufw):

   Use rules that limit the number of connections from a single IP address; close unused ports.

   
   # Example: limiting SYN packets
   iptables -A INPUT -p tcp --syn -m connlimit --connlimit-above 10 --connlimit-mask 32 -j REJECT --reject-with tcp-reset
   # Example: limiting SSH connections
   iptables -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --set --name SSH -j ACCEPT
   iptables -A INPUT -p tcp --dport 22 -m state --state NEW -m recent --update --seconds 60 --hitcount 4 --name SSH -j DROP
           

3. Using Fail2Ban: Automatic blocking of IP addresses that perform suspicious actions (e.g., multiple failed login attempts).
4. Web Server Optimization (Nginx/Apache): Configure limits on the number of simultaneous connections, buffer sizes, and timeouts. This will help the server better handle L7 attacks.
5. Using a CDN: A Content Delivery Network (CDN) distributes load, caches static content, and can act as the first line of defense against DDoS, filtering out part of the traffic before it reaches your server.
6. Regular Updates: Update the operating system, web server, database, and all applications to close known vulnerabilities.
7. Monitoring: Implement a monitoring system that will alert you to unusually high traffic, CPU, or memory usage.

Conclusion

Choosing a dedicated server with DDoS protection is an investment in the stability and security of your online project. Assess the criticality of your service, potential threats, and budget to select an optimal solution that combines powerful hardware resources and an adequate level of protection against DDoS attacks.