Tag: Reverse Proxy

Problems related to reverse proxy configurations or issues

ID	Title	Description	Category	Technology	Tags
CRE-2025-0075 Critical Impact: 10/10 Mitigation: 6/10	Nginx Upstream Failure Cascade Crisis	Detects critical Nginx upstream failure cascades that lead to complete service unavailability. This advanced rule identifies comprehensive upstream failure patterns including DNS resolution failures, connection timeouts, SSL/TLS handshake errors, protocol violations, and server unavailability, followed by HTTP 5xx error responses within a 60-second window. The rule uses optimized regex patterns for maximum detection coverage while maintaining high performance and low false-positive rates. It captures both the root cause (upstream failures) and the user-facing impact (HTTP errors) to provide complete incident context.	load-balancer-problem	nginx	Nginx Reverse Proxy Service Outage High Availability Load Balancer Cascading Failure