Error "Server returned status code: 0" when registering VCF Operations or applying a new license in the Broadcom Business Console

Products

• VCF Operations

Issue/Introduction

When attempting to register VMware Cloud Foundation (VCF) Operations in the Broadcom Business Console or apply a new license file, the registration process fails.

During the attempt, users encounter an error message similar to the following: 

Server returned status code: 0

Environment

• VCF Operations 9.x

Cause

This issue is caused by a network proxy restriction.

Analysis of HTTP Archive (HAR) files captured during the registration process indicates that while general traffic is routing through the network proxy, specific requests required for authentication and licensing are being rejected or blocked by the proxy server. A status code of 0 typically indicates that the network request was terminated or blocked by an intermediary network appliance (like a firewall or proxy) before a valid HTTP response could be returned by the Broadcom server.

Resolution

• Inspect the proxy server logs during a failed registration attempt to identify the specific rule dropping the traffic.
• Whitelist Required Endpoints: Ensure that the following domain names are explicitly whitelisted and reachable via outbound HTTPS (Port 443) from the VCF Operations appliances without SSL interception or inspection: 

  vcf.broadcom.com
  eapi.broadcom.com

   
• Retry Registration: Once the proxy rules have been updated and verified, return to the Business Console and re-attempt the VCF Operations registration and license application.

Additional Information

Refer: Error: “Server returned status code: 0” when uploading usage file to BSC