Under a DDoS attack?
A distributed denial-of-service (DDoS) attack is where a large number of computers or devices, usually controlled by a single attacker, attempt to access a website or online service all at once. This flood of traffic can overwhelm the website's origin servers, causing the site to slow down or even crash.
sequenceDiagram;
participant User;
participant Website;
participant Server;
participant Botnet;
User->>Website: Requests to access site
Website->>Origin Server: Processes user requests
Botnet->>Origin Server: Sends a flood of traffic
Origin Server-->>Website: Slows down due to traffic overload
Origin Server-->>User: Unable to respond to user requests
Common signs that you are under DDoS attack include:
- Your site is offline or slow to respond to requests.
- There are unexpected spikes in the graph of Requests Through Cloudflare or Bandwidth in your Cloudflare Analytics app.
- There are strange requests in your origin web server logs that do not match normal visitor behavior.