Effective ways to prevent DDoS attack for Website, VPS, Server

Latest Update: 12/10/2023

Effective ways to prevent DDoS attack for Website, VPS, Server

DDoS attacks are becoming a growing threat to websites globally, directly affecting business operations as well as causing losses to enterprises. DDoS attacks can cause user web access experience to be slow or inaccessible, leading to a decrease in the reputation of the business.

So how to prevent DDoS attacks and keep your business website safe? Let’s find out with VNETWORK in this article.

What is a DDoS attack?

A DDoS (Distributed Denial of Service) attack is a form of overloading the network or resources of a website or application by sending multiple requests from different sources simultaneously. This is one of the cyberattacks that has caused a lot of damage to website owners for decades.

Types of denial of service (DDoS) attacks

Currently, there are many types of DDoS attacks, the most common can be mentioned:

  • UDP flood attack.

  • SYN flood attack.

  • HTTP flood attack.

  • Amplification attack.

Each of these types of attacks will have different ways of working and targets, but the general purpose of DDoS attacks is to overload the system and cause crashes or outages.

Effective ways to prevent DDoS attack for Website, VPS and Server

1. Infrastructure investment:

It is necessary to have a good infrastructure, strong enough to resist direct DDoS attacks on the server. Building a robust network architecture with multiple servers in different geographical locations, will help handle the large flow of network traffic through the secondary server, once the main server is attacked. One of the key factors in server distribution is the use of load balancers. This technology helps distribute work and traffic steadily between servers, thereby minimizing the impact of an attack on a single server. In addition, geographical distribution is another way to deal with DDoS attacks. By placing servers in many different locations, users can disperse traffic and minimize the impact of the attack on the entire system.

Data centers also play an important role in server distribution. Placing servers in different data centers helps ensure system availability and redundancy. If one region is attacked, servers in other regions can continue to operate, ensuring stability and continuous access for users.

Find more information about the Data Center here..

Investing in physical infrastructure is also extremely important. The strong router investment plays a special role in connecting and directing data between subnets in the system. By using a high-processing router, the ability to transmit data over the network will be optimized and system congestion will be minimized. In addition, the router needs to support security features such as firewalls and network virtualization, ensuring the safety of the system from network threats.

Next, choosing high-quality cables and network connections is not to be missed. Using fiber optic cable or Cat6/Cat7 cable will help ensure fast and stable data transmission speed. At the same time, management and maintenance of the network connection is also important to avoid unnecessary connection problems and congestion.

Finally, investing in network hardware is the deciding factor. High-processing switches help share data and connections between devices in the network efficiently. In addition, consideration of network controllers and network cards with good performance also plays an important role to ensure compatibility and stable operation of the system.

2. Restrict traffic flow

Blocks the flow of traffic from some countries, which helps mitigate DDoS attacks. While this is not an effective solution, it enhances enterprises current security measures to mitigate DDoS attacks. For example, botnets are created using thousands of hacked websites, computers infected with viruses, compromised CCTV and other equipment. These botnets engage in massive DDoS attacks with resources sourced from many parts of the globe. Therefore, blocking IP by country to fight against botnets can be an effective solution to reduce the load of large-scale DDoS attacks.

In addition, it is also possible to implement basic security methods such as using hard-to-guess passwords, building a secure website security firewall. While these measures are not enough to prevent a sophisticated DDoS attack, it does play an important role in website security.

Find more information about Website Security here.

3. Use CDN (Content Delivery Network)

CDN stands for Content Delivery Network, which is a content delivery system on the Internet, designed to deliver web content to end users quickly and efficiently. When a user requests access to a website, that request is routed to the nearest CDN server, which stores a copy of the content. As a result, content can be quickly accessed from a server near the user, improving the user experience and keeping customers on the site longer.

CDNs also help reduce the load on the origin server by serving content from distributed servers in the system. This reduces pressure on the origin server and increases the tolerance of the system. By distributing the load across servers, CDNs help avoid overload and ensure website stability.

Furthermore, CDNs provide greater availability of content. With a distributed server network, if one server goes down, other servers in the CDN can still serve content, minimizing damage from DDoS Layer 3, Layer 4. CDN also helps balance traffic to the website, and distribute them to many different servers around the globe. Thereby, it will be more difficult for attackers to target the website. This ensures the continuity and stability of the site, which helps to avoid unwanted interruptions.

Find more information about CDNs here.

4. Use Cloud WAF (Web Application Firewall)

Cloud WAF (Web Application Firewall) system is a network security service deployed in the cloud to protect web applications from attacks and security vulnerabilities. The system acts as a web application firewall, monitoring and controlling the flow of data in and out of the web application.

Cloud WAF uses rules and analysis mechanisms to identify and prevent attacks such as SQL injection, cross-site scripting (XSS), cross-site request forgery (CSRF), and others. It is also capable of protecting important data and information, preventing the leakage of sensitive information and cyberattacks.

The system operates on a distributed network of servers, allowing for the dispersion of the load and increased tolerance. It can be integrated with other cloud services such as CDN (Content Delivery Network) to optimize the performance and reliability of the web application.

The deployment of Cloud WAF system enhances the security of the web application, minimizes the risk of attack and ensures the availability and reliability of the system. It provides an extra layer of protection for the web application, helps prevent attacks and protects important data on the network.

Learn more about the Cloud WAF system here.

5. Use load balancing system (Load Balancing)

Using load balancing is an important method to optimize network performance and endurance. It helps to distribute work and load steadily between servers or components in the system, avoiding overload and ensuring that the system operates efficiently.

Load balancing methods such as Round Robin, Least Connections, IP Hash, Layer 4 Load Balancing, and Layer 7 Load Balancing are used to distribute access requests fairly and intelligently. With load balancing, requests from users are divided evenly and go to different servers, helping to avoid server overload and ensure high performance.

Leveraging load balancing enhances system stamina and readiness. By distributing the load across multiple servers, load balancing ensures that each server operates within a reasonable load bearing range, avoiding disruptions and ensuring system stability.

In addition, load balancing enhances data transmission efficiency and reduces response time. With access request delivery, users get a quick response from distributed servers, improving their experience and keeping customers on the site.

6. DDoS protection service

Today, many security service providers meet DDoS protection needs by offering Anti-DDoS services. These services used advanced algorithms and analysis technologies to detect and prevent DDoS attacks.

Anti-DDoS services work by monitoring network traffic and analyzing activity patterns to identify signs of DDoS attacks. When an attack is detected, the service applies safeguards to block and filter abnormal traffic, keeping the system functioning properly.

VNETWORK provides an effective anti-DDoS Website, DDoS Web Server with VNIS security solution that is both safe and optimal for businesses.

Effective ways to prevent DDoS attack for Website, VPS, Server

VNETWORK multi-CDN infrastructure

a. Protect website with VNIS solution of VNETWORK

VNIS has global alliedCloud WAF(Multi WAF) infrastructure, helping to enhance maximum security on a global scale. In addition, the system also has Scrubbing Center to help coordinate the performance of WAFs effectively, ensuring the system always operates safely against all DDoS attacks infecting the website.

VNIS operates based on amulti CDNnetwork in 32 countries, a power alliance from all the world’s leading CDNs such as Akamai, Fastly, CLoudflare, Alibaba Cloud, Stackpath, Tencent Cloud, CDNetworks,… And also leading Asia CDN services such as VNCDN. The system is capable of deliveringanti-DDoS(DDoS Layer 3/4) strength up to 2,600Tbps.

VNIS also integrates smart technologies with AI (Artificial intelligence), Load Balancing and RUM (Real User Monitoring) to ensure stable website performance and fastest content transmission speed to users. VNIS also supports the automatic IP hiding function, which is considered a plus point of the system. Once VNIS security system is activated on the website of enterprises with just a few mouse clicks, the IP server is automatically hidden.

SOC system in 4 countries, enhancing security coordination between people and systems. Dealing with hackers requires human flexibility and awareness to increase judgment, as well as combination with optimal technologies to respond quickly to sophisticated cyber attacks. This is necessary, as the suspension of enterprise systems can directly affect business activities as well as reduce credibility in the eyes of customers.

Learn more about the VNIS solution here.

b. Optimizing budget with VNETWORK’s VNIS solution

When using VNIS, enterprises only need to work on 1 single portal. All activities such as administration, monitoring, monitoring, and analysis of security activities, as well as the performance of global CDNs do not take too much time, effort, or in-depth management. All of this has brought huge financial benefits to the business.

In the case of using multiple CDNs at the same time (multi-CDN), enterprises do not even need to carry out procedures such as contact, price deal, service quality commitment, or contact support from each CDN provider. Especially, when users are in countries near China or within China, enterprises can still access this market without having to go through paperwork about ICP License.

If you want to experience VNIS website security solution, immediately contact VNETWORK for support at Hotline: (028) 7306 8789 or email to or

Sitemap HTML