To support API abnormal traffic control from the network architecture level, several strategies can be implemented to mitigate DDoS attacks, throttling, and other traffic anomalies. Here’s a breakdown with examples and relevant cloud services:
-
Traffic Filtering and Rate Limiting:
- Use Web Application Firewalls (WAF) to filter malicious requests. Configure rate-limiting rules to restrict excessive API calls per IP or user.
- Example: If an API receives 10,000 requests per second from a single IP, the WAF can block or throttle the traffic.
- Cloud Service: Tencent Cloud WAF and API Gateway support rate-limiting and IP filtering.
-
Load Balancing and Auto-Scaling:
- Distribute traffic across multiple servers using Load Balancers to prevent single-point failures. Auto-scaling ensures resources adjust dynamically to handle traffic spikes.
- Example: During a traffic surge, auto-scaling adds more API server instances to maintain performance.
- Cloud Service: Tencent Cloud CLB (Cloud Load Balancer) and Auto Scaling.
-
DDoS Protection:
- Deploy DDoS mitigation services to absorb and filter large-scale attacks before they reach the API servers.
- Example: A volumetric DDoS attack targeting the API’s IP can be mitigated by a DDoS protection layer.
- Cloud Service: Tencent Cloud Anti-DDoS Pro and Anti-DDoS Advanced.
-
API Gateway for Traffic Management:
- Use an API Gateway to enforce throttling, quotas, and request validation. It acts as a centralized entry point for API traffic.
- Example: The gateway limits each client to 1,000 requests per minute.
- Cloud Service: Tencent Cloud API Gateway.
-
Content Delivery Network (CDN):
- Cache static API responses at edge nodes to reduce backend load and improve response times.
- Example: Frequent GET requests for product details can be served from CDN caches instead of hitting the API server.
- Cloud Service: Tencent Cloud CDN.
By combining these measures, the network architecture can effectively handle abnormal traffic while ensuring API reliability and performance.