Long Van Systems & StormWall: How Automated DDoS Protection Delivered Peace of Mind

Many regions, including Latin America, Africa, and Southeast Asia, are experiencing rapid digital transformation. Infrastructure providers in these markets are becoming increasingly targeted by DDoS attacks.  

Vietnam is no exception. The country’s international network capacity remains more limited than that of major connectivity hubs in Europe and North America. As a result, an attack on a single infrastructure provider can disrupt connectivity for thousands of customers whose businesses depend on reliable access to international resources, ultimately affecting millions of end users.

Traditional mitigation methods are often insufficient against large-scale, multi-vector DDoS attacks, where threat actors combine multiple attack techniques to overwhelm their targets.

In this case study, we explain how StormWall helped Long Van Systems protect its infrastructure from UDP and SYN flood attacks, maintain reliable international connectivity, and ensure uninterrupted access to critical online resources.

At a glance

Customer / Industry	Long Van Systems — IT infrastructure and cloud service provider, Vietnam
Our services	StormWall for Networks — cloud-based DDoS protection via BGP
Protected resources	Network infrastructure, web hosting, cloud solutions, VPS, bare-metal dedicated servers

Customer: Long Van Systems

Long Van Systems is a Vietnamese provider of IT infrastructure and cloud services. The company offers network infrastructure, web hosting, cloud platforms, VPS, bare-metal dedicated servers, and virtualization clusters based on Proxmox.

Today, Long Van Systems serves approximately 4,000 customers, ranging from e-commerce platforms to enterprise applications. For these organizations, the company provides the critical infrastructure that keeps their digital services running around the clock.

The provider’s infrastructure hosts thousands of virtual machines and dedicated servers belonging to its customers. When outages occur, the impact extends far beyond the provider itself — thousands of businesses and millions of end users can be affected.

The consequences include:

• Website and web application outages.
• Disruption of critical business operations.
• Financial losses and reputational damage.
• Loss of customer trust.

Challenge: Staying Online Under Siege 

Vietnam’s regional network infrastructure presents unique challenges for infrastructure providers. Compared to major connectivity hubs in Europe and North America, international bandwidth is more limited, making providers attractive targets for DDoS attacks. Threat actors often exploit this by launching attacks designed to saturate international links and disrupt connectivity.

On May 14, 2026, Long Van Systems became the target of a large-scale DDoS attack. The attackers combined two attack vectors:

• UDP Flood — high-volume traffic designed to saturate upstream bandwidth.
• SYN Flood — attacks aimed at exhausting connection tables on edge network infrastructure.

These attacks had the greatest impact on the provider’s international connectivity, disrupting services for customers whose businesses rely on stable access to overseas resources.

Initially, Long Van Systems relied on conventional mitigation techniques, including manual null routing, firewall rate limiting, and basic ACL-based filtering.

However, these measures proved insufficient for several reasons:

• Reactive rather than proactive protection. Mitigation began only after the attacks had already started affecting services, instead of preventing disruption.
• Overly broad filtering. Applying null routing to entire IP ranges blocked both malicious and legitimate traffic, resulting in unnecessary service disruption.
• Heavy operational overhead. Every incident required constant manual intervention from the Network Operations Center (NOC) team.

Long Van Systems needed a solution capable of automatically detecting and mitigating attacks without affecting legitimate traffic or requiring manual intervention during every incident.

Solution: Local Presence, Enterprise-Grade Protection  

After evaluating several DDoS protection providers, Long Van Systems selected StormWall based on a combination of technical capabilities and business advantages:

• Proven ability to mitigate attack traffic without affecting legitimate users.
• Responsive and knowledgeable technical support throughout the evaluation process.
• Competitive pricing without compromising the quality of threat detection and mitigation.
• Regional scrubbing infrastructure designed to deliver low latency for Asia-Pacific traffic.  
• Comprehensive protection against the UDP and SYN flood attacks the company was experiencing.
• Flexible service plans that allow protection to scale alongside business requirements.

Deployment: Seamless Integration with Minimal Downtime 

StormWall deployed the solution using GRE tunneling, directing protected IP traffic through its global scrubbing infrastructure. The entire deployment took approximately three days, from the initial configuration to full production rollout and stable operation.

The primary technical challenge was configuring the GRE tunnel to ensure seamless traffic routing without introducing additional latency or packet loss.

“StormWall’s engineering team provided hands-on support throughout the deployment process. Their responsiveness and willingness to work directly with our network engineers made a significant difference. What could have been a complex deployment was completed quickly and smoothly thanks to their expertise,”

notes Nguyen Huu Ru, Director, Long Van Systems. 

Results: Automated Protection That Just Works 

Since deploying StormWall, Long Van Systems has successfully mitigated every DDoS attack targeting its infrastructure.

The company achieved the outcomes it was looking for:

• Automated detection and mitigation of DDoS attacks.
• Reliable protection against volumetric DDoS attacks.
• Continuous availability of customer-facing services.
• Significantly reduced manual intervention by the operations team.
• Fast, expert support from the  support team.
• Consistent traffic filtering without disrupting legitimate users.   

“StormWall gave us something we didn’t have before: peace of mind. The platform delivers exactly what it promises — reliable, automated DDoS protection at a competitive price. As an infrastructure provider serving thousands of businesses, we can’t afford to react only after an attack has already disrupted our customers. With StormWall’s automated protection and hands-on engineering support, our team can focus on growing the business instead of responding to incidents. For hosting providers and cloud service providers across Southeast Asia facing volumetric DDoS attacks, StormWall is a solution we can confidently recommend,”

says Nguyen Huu Ru, Director, Long Van Systems.