A payload is the body of an HTTP request or response—JSON in a POST, a ZIP file download, or an image binary. Large or unusual payloads can trigger WAF rules.
Mitigation:
Chunked uploads: Split big uploads into parts.
Rotate IPs: Spread high-bandwidth downloads across Proxied's pool to stay below per-IP thresholds.
MIME awareness: Send correct Content-Type headers so proxies and servers handle payloads properly.