The DDoS Threat Has Evolved. Has Your Protection?
The impact of a DDoS attack can extend far beyond a website being temporarily unavailable. A significant Distributed Denial-of-Service attack is estimated to cost a UK organisation nearly £100,000 on average [1]. And that potential cost sits against a growing threat. UK targets experienced the equivalent of around 600 DDoS attacks every day during the first half of 2025[2], while globally 20.5 million DDoS attacks were blocked in the first three months of the year alone - a 358% increase year on year [3] .
Each attack has the same fundamental objective: to overwhelm an online service with malicious traffic, leaving genuine customers and employees struggling to access the website, application or connection they need.
DDoS is neither a theoretical nor a distant threat. By the final quarter of 2025, the UK had risen 36 places to become the sixth most-targeted location globally for DDoS attacks[4].
The shift reflects a form of attack that is becoming larger, faster and easier to launch.
Once associated mainly with governments, global brands and major online platforms, DDoS now belongs in the wider business conversation. As attack tools have become more widely available, organisations of every size, including SMEs, need to understand what happens when malicious traffic crowds out genuine users.
What is a DDoS attack?
Picture a busy venue with a bouncer controlling the entrance. On a normal night, genuine customers arrive, the queue moves steadily and each person is guided inside. Now imagine thousands - or even millions - of fake customers turning up at the same time.
They crowd the entrance, overwhelm the bouncer and prevent genuine customers from getting through. Even though the venue itself is still there, it can no longer serve the people trying to access it. This is essentially how a distributed denial-of-service (DDoS) attack works.
Instead of fake people overwhelming a physical entrance, attackers use large numbers of compromised devices to send malicious traffic or requests to a website, application, server or internet connection. The “distributed” part means that the traffic comes from many different sources simultaneously, making it harder to identify and block. As the target’s available capacity is consumed, legitimate requests are crowded out. Services may become slow, unreliable or completely unavailable. Unlike attacks designed to enter a network unnoticed and steal information, the immediate purpose of a DDoS attack is disruption: stopping genuine users from accessing the services they need.
DDoS has changed
In 2026, the digital landscape has changed dramatically. As more people and businesses depend on - and operate within - the online space, the DDoS threat has evolved alongside them. Modern attacks are not simply larger versions of those seen in the past.
They are easier and cheaper to launch, require less technical expertise and can be directed at organisations of almost any size. Motivations vary too, ranging from hacktivism and extortion to competitive disruption and simple opportunism.
The scale of these attacks is also increasing. Cloudflare’s 2026 Threat Report highlights the rise of extremely large attacks powered by botnets such as Aisuru - vast networks of malware-infected devices that attackers control remotely and use to flood a target with traffic. These attacks can reach extreme levels within seconds, leaving little opportunity for human intervention. Relying on someone to identify the problem and respond manually is no longer a credible defence.
But size is only part of the threat. Attackers can combine large-scale network floods with protocol and application-layer techniques designed to exhaust specific resources. The result does not need to be a complete outage to cause damage. Intermittent failures, severe delays and unreliable access can be enough to frustrate customers, interrupt operations and undermine confidence.
Why this matters to SMEs
For SMEs, a denial-of-service attack can have consequences far beyond the initial disruption. When websites, cloud applications or internet-based communications become unavailable, employees may struggle to work, customers can be unable to access services, and normal business operations can quickly be affected. As SMEs become increasingly dependent on being online, maintaining that accessibility becomes an important part of business resilience. If your business depends on being online, the question is no longer simply whether your systems are secure. It is whether the business can continue operating when its digital front door is overwhelmed.
The real cost is not limited to downtime
A common misconception is that an attack is only serious if information is stolen. DDoS may not begin as a data breach, but the absence of stolen data does not make an outage harmless.
Revenue can stop when customers cannot transact. Staff time is lost when systems become unreachable. Service teams face extra pressure. Contractual obligations may be missed. Customers rarely distinguish between a malicious attack and a technical failure; they simply see a business that is unavailable when they need it.
Trust can take longer to restore than the service itself. For an SME competing on responsiveness, reliability or digital convenience, repeated disruption can undermine the reputation it has worked hard to build.
Preparedness starts with the right questions
The answer is not panic. It is preparation.
Business leaders do not need to become DDoS specialists, but they should understand where availability matters most.
Which internet-facing services are critical?
What would an hour of disruption cost?
Who takes ownership during an attack?
What protection is already in place, and has it been tested against the way attacks operate today?
Traditional firewalls and standard hosting arrangements remain important, but they are not automatically a substitute for dedicated DDoS protection. Effective defence needs to identify abnormal traffic quickly, filter malicious requests and preserve access for genuine users before infrastructure is overwhelmed. Response roles and escalation routes should also be agreed in advance, when decisions can be made calmly rather than during an outage.
Protecting the digital front door
No solution can prevent a business from becoming a target. If an attacker chooses to launch malicious traffic at a network, they can attempt to do so. The priority is to identify that activity quickly and stop it from overwhelming the services the organisation depends on.
The system establishes a baseline of normal network activity and continually evaluates live traffic against it, looking for unusual patterns and signs of a DDoS attack.
Think of it like airport security. Thousands of legitimate passengers need to move through efficiently, while anything suspicious must be identified and stopped before it can cause disruption. Securus Shield applies the same principle to network traffic. When malicious activity is detected, the system responds within seconds, filtering it through Securus routers in real time.
This intervention takes place at the network edge, before the attack can overwhelm the service provider’s infrastructure or the customer’s equipment. If the attack changes its behaviour or technique, Securus Shield adapts its response to continue mitigating the threat.
For larger volumetric attacks that exceed the available network capacity, traffic can be redirected through a cloud-based scrubbing centre. Malicious activity is removed, allowing clean traffic to continue to its intended destination. The objective is straightforward: identify and stop hostile traffic while keeping the digital front door open to genuine customers and employees.
DDoS is no longer simply a large-enterprise concern or something to address after an incident. Attacks have become easier to launch, increasingly automated and capable of causing disruption at speed. For businesses that depend on websites, cloud applications, remote-access services and reliable connectivity, availability must now be treated as a core part of operational resilience.
The right response is not panic. It is preparedness.
Sources
[1] Department for Science, Innovation and Technology and KPMG, Economic modelling of sector specific costings of cyber attacks (April 2025), p. 6. The report estimates £97,560 for a significant DoS attack and notes that the model is based predominantly on underlying US data converted to UK pounds using purchasing power parity. https://assets.publishing.service.gov.uk/media/68b1bdd5cc8356c3c882a904/Economic_modelling_of_sector_specific_costings_of_cyber_attacks.pdf
[2] NETSCOUT, DDoS Threat Intelligence Report: United Kingdom, first half of 2025. https://www.netscout.com/threatreport/1h2025/country/united-kingdom-of-great-britain-and-northern-ireland/
[3] Cloudflare, DDoS Threat Report for 2025 Q1. https://blog.cloudflare.com/ddos-threat-report-for-2025-q1/
[4] Cloudflare Radar, DDoS Threat Report for 2025 Q4. https://radar.cloudflare.com/reports/ddos-2025-q4