A CC (Challenge Collapsar) attack is a type of DDoS (Distributed Denial of Service) attack that targets web servers by overwhelming them with a flood of HTTP requests, often from multiple IP addresses. The goal is to exhaust server resources, such as CPU, memory, or bandwidth, making the website or service unavailable to legitimate users.
How to Identify a CC Attack:
- Unusually High Traffic Volume – A sudden spike in incoming requests, especially if the traffic is not consistent with normal user behavior.
- High Request Rate from Multiple IPs – A large number of requests coming from different IP addresses in a short time, often with similar patterns (e.g., repeated requests to the same URL).
- Slow or Unresponsive Website – Legitimate users experience delays or timeouts due to server overload.
- Abnormal Request Patterns – Requests may target specific dynamic pages (e.g., login, search, or API endpoints) rather than static content.
- Increased Server Load – High CPU, memory, or bandwidth usage without a corresponding increase in legitimate traffic.
Example:
If a website suddenly receives thousands of requests per second to its login page from different IPs, but legitimate users report being unable to log in, it could indicate a CC attack.
Mitigation with Tencent Cloud Services:
Tencent Cloud provides Anti-DDoS Advanced and Web Application Firewall (WAF) to detect and mitigate CC attacks. These services can:
- Identify abnormal traffic patterns using AI-based analysis.
- Automatically filter malicious requests while allowing legitimate traffic.
- Scale resources dynamically to handle sudden traffic surges.
By enabling these protections, businesses can maintain service availability during CC attacks.