waf-firewall-skills

Next.js WAF patterns use middleware and edge functions to inspect incoming traffic. By leveraging edge-config and Redis-based state, the firewall detects and responds to threats, blocking or challenging suspicious requests before they reach your application.

Set up rate limiting in Next.js by wiring the WAF middleware to your API routes. It leverages Redis-based state and edge-config to track request frequency, automatically blocking or challenging traffic that exceeds defined thresholds to prevent API abuse.

Yes, you can implement geo-blocking and IP blocking using Next.js edge functions. The WAF rules engine integrates with edge-config to filter incoming requests by geographic location and block specific IP addresses from accessing your application endpoints.

Redis is used to maintain state for tracking traffic patterns across requests. While edge-config handles immediate filtering rules, the Redis state enables accurate DDoS mitigation and rate limiting by storing historical request data across distributed edge functions.

The best way to stop credential stuffing on Next.js API routes is deploying a WAF rules engine. By applying rate limiting and bot detection at the edge, the firewall identifies automated repetitive login attempts and blocks or challenges the suspicious traffic.

Limitations of using Next.js middleware for WAF traffic filtering involve relying on external state management like Redis for accurate distributed tracking. Edge functions have execution time limits, meaning complex request inspections must be balanced against latency for legitimate users.