# Gateway & Network Failures

> Diagnose gateway errors and missing webhook events.

- **Category**: Troubleshoot
- **Last Verified**: 2026-07-14

## Symptom

Requests return 502 Bad Gateway, 503 Service Unavailable, or 504 Gateway Timeout.

## What it means

The Kourier ingress controller cannot establish a stable socket connection with the Knative pod.

## How to fix it

Check if the container is currently active. If it scaled down to zero, wait 5 seconds to wake it up. If crashes continue, consult container crash diagnostics.