Browsing Broken Website Error "(failed) net:ERR_BLOCKED_BY_ORB"

Products

• ISG Proxy
• ProxySG Software - SGOS

Issue/Introduction

When attempting to access a website, resources are not loading. In reviewing a HAR file, we see a lot of (failed) net:ERR_BLOCKED_BY_ORB in the status column.

Cause

The net::ERR_BLOCKED_BY_ORB error is a generic error message that can occur when the browser blocks a request due to security reasons. ORB stands for "Origin Request Blocker".

This issue is seen with CORS.

This can be caused by redirecting or blocking a CORS transaction.

Resolution

If the issue is redirection, this can be addressed with Resolve Issues with Cross-Origin Resource Sharing

Alternatively, identifying the exact block by Debug Policy Using Policy Trace and resolving the block in policy will address the errors.