How do I troubleshoot issues with Traefik's IP whitelist and Cloudflare? What logs should I check?

Troubleshooting involves checking several logs. First, examine Traefik's access and error logs for 403 Forbidden errors, which indicate blocked requests. Also, check Cloudflare's logs to verify that requests are indeed being routed through Cloudflare. Use tools like `tcpdump` or `wireshark` to capture network traffic and confirm the source IP addresses. Ensure your Traefik configuration is correctly formatted and that the Cloudflare IP ranges are accurate and up-to-date. Finally, verify DNS resolution is pointing to your Traefik instance.