A DDoS attack can be surprisingly hard to spot at first. Your website gets slow. A few users complain. Then the login page stops loading properly, while another part of the site seems completely fine. Annoying, but not always obvious.
Watch What Happens to Your Traffic
Open your traffic dashboard and compare the current activity with a normal day. Don’t panic over one big number. A campaign going live or a page suddenly appearing in search can cause a genuine traffic jump too.
With a DDoS attack, the traffic often behaves strangely. You may see huge request volumes arriving from many different IP addresses. The requests can also hit the same page repeatedly, which is a pretty strong reason to investigate.
Strange Traffic Patterns
A few things should make you pause:
• Traffic suddenly jumps far beyond your normal range, especially outside your usual busy hours.
• One URL is getting hammered while the rest of the website barely sees a change.
• Requests coming from an unusual spread of locations, with patterns that don’t match your normal visitors.
• Your server logs are filling up much faster than usual. That’s worth checking before you blame the hosting company.
And don’t rely only on geography. Attack traffic can look surprisingly normal on the surface, especially when the attacker has access to a large pool of devices.
Check Your Server Behaviour
Your server usually gives you another clue. During an attack, CPU usage can shoot up. Memory can get squeezed. Network bandwidth may also reach its limit, making normal visitors wait while the server struggles to deal with incoming requests.
Look at the Logs
Logs are boring until something goes wrong. Then they’re incredibly useful.
Check whether requests are arriving much faster than normal. Look for repeated requests that follow the same pattern. If your application logs show thousands of similar requests within a short window, you’ve got something worth digging into.
Separate an Attack From a Normal Traffic Spike
This is where people often jump to the wrong conclusion. A traffic spike doesn’t automatically mean DDoS.
A product launch can create heavy traffic. A news story can do it too. So compare the traffic with your analytics data and recent marketing activity before calling it an attack.
The trick is to look for several signals happening together. Your traffic rises sharply. Response times get worse. Server resources climb. Normal users start seeing errors. When those things line up, a DDoS attack becomes much more likely.
Honestly, this is also why basic monitoring is worth setting up before anything happens. Trying to understand an attack with no historical traffic data is like trying to remember how fast your car normally drives after the engine has already started smoking.
What Should You Do Next?
Once the pattern looks suspicious, don’t keep guessing. Check your hosting or cloud provider’s monitoring tools and review any security alerts. If you’re using a DDoS protection service, check whether it has detected unusual traffic and whether mitigation has started.
And don’t immediately block random IP addresses one by one. Large attacks can involve huge numbers of sources, so that approach quickly becomes a game of whack-a-mole.
You want to find the pattern behind the traffic, not just chase individual addresses. That’s usually where the useful answer is hiding.