While DDoS attacks often make headlines when they target large corporations, they can affect businesses of any size.
Understanding what a DDoS attack is, how it works, and how to reduce your risk can help your organization stay prepared.
What Is a DDoS Attack?
A Distributed Denial-of-Service (DDoS) attack is a cyberattack designed to overwhelm a website, server, or network with an excessive amount of internet traffic. Instead of using a single computer, attackers control thousands or even millions of compromised devices to flood a target with requests.
As the volume of traffic increases, legitimate users may experience slow performance, connection errors, or complete service outages because the server is too busy processing malicious requests.
Think of it like trying to enter a busy store where every aisle is packed with people who aren’t actually shopping. Genuine customers can’t get through, even though the store itself hasn’t been physically damaged.
How Does a DDoS Attack Work?
Most DDoS attacks begin with a network of infected devices known as a botnet. These devices can include personal computers, smartphones, smart TVs, security cameras, routers, and other internet-connected equipment that has been infected with malware.
Once the attacker activates the botnet, every compromised device begins sending requests to the same target at the same time. The combined traffic overwhelms the target’s available resources, making it difficult or impossible for legitimate users to access services.
The goal isn’t usually to steal information directly. Instead, attackers want to make systems unavailable, interrupt business operations, or create distractions while carrying out other malicious activities.
Common Types of DDoS Attacks
Not all DDoS attacks work the same way. Some of the most common include:
- Volume-Based Attacks: These attacks attempt to consume all available internet bandwidth by sending massive amounts of traffic to a website or network.
- Protocol Attacks:Protocol attacks exploit weaknesses in network communications by overwhelming firewalls, load balancers, or servers with connection requests.
- Application Layer Attacks: Rather than flooding an entire network, these attacks target specific applications or websites by repeatedly requesting resource-intensive pages until the application becomes unavailable. Because application-layer attacks often resemble legitimate user traffic, they can be more difficult to detect.
Warning Signs of a DDoS Attack
Although every situation is different, businesses may notice several warning signs, including:
- Extremely slow website performance
- Websites or applications becoming unavailable
- Frequent timeout errors
- Sudden spikes in internet traffic
- Network congestion without an obvious cause
- Customers reporting they cannot access your website or online services
These symptoms don’t always indicate a DDoS attack, but they should be investigated promptly to determine the underlying cause.
How Can a DDoS Attack Affect Your Business?
A successful DDoS attack can have serious consequences beyond temporary downtime.
Lost Revenue: If customers can’t access your website, online store, or customer portal, they may take their business elsewhere.
Reduced Productivity: Employees may lose access to cloud applications, email, collaboration tools, or internal systems, preventing them from completing their work.
Damage to Your Reputation: Repeated outages can reduce customer confidence and make your business appear unreliable.
Increased IT Costs: Responding to an attack often requires emergency support, additional security resources, and recovery efforts that can quickly become expensive.
How to Reduce the Risk of a DDoS Attack
Use Business-Grade Firewalls: Modern firewalls help filter malicious traffic before it reaches your network.
Work with an Experienced IT Provider: Managed IT providers continuously monitor networks, identify suspicious activity, and respond quickly when unusual traffic patterns occur.
Keep Systems Updated: Regular software updates and security patches help close vulnerabilities that attackers may exploit.
Build Redundancy into Your Infrastructure: Cloud-based hosting, content delivery networks (CDNs), and redundant internet connections can improve resilience during an attack.
Monitor Network Traffic: Continuous monitoring makes it easier to identify abnormal traffic patterns before they become larger issues.
Develop an Incident Response Plan: Knowing who to contact and how to respond can significantly reduce downtime if your business experiences an attack.
If you believe your business is experiencing a DDoS attack:
- Notify your IT provider immediately.
- Contact your internet service provider if internet connectivity is affected.
- Avoid making major network changes until the attack has been analyzed.
- Monitor critical business systems for additional suspicious activity.
- Document what occurred to support future security improvements.
Quick action can often reduce downtime and help restore services more efficiently.
