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When you use CDF with Private Link, your browser may prompt you to allow local network access. This article explains why this happens and how to manage the permission.

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Why you see the Local Network Access permission prompt

CDF Private Link endpoints use private IP addresses on your local network to provide secure connectivity to CDF. Starting with Google Chrome v.142 and Microsoft Edge v.143, browsers require explicit permission before a public website can access local network resources. This Local Network Access security feature affects your Private Link endpoint. You can grant this permission through a prompt or by implementing a browser policy.
When accessing a Private Link-enabled CDF project, you must select Allow on the permission prompt. This grants CDF access to local network resources and saves the preference in your browser. CDF will only use this permission to access your CDF Private Link endpoint.

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Restore access if blocked

If you accidentally click Block, you’ll lose access to data within your Private Link-enabled CDF project. To restore access, follow these browser-specific steps:
1

Open Chrome settings

Open Chrome and navigate to: chrome://settings
2

Access site settings

Go to Privacy and security > Site settings.
3

View stored site data

Scroll down to View permissions and data stored across sites (or search for “cognite.com” in the search bar at the top of Site settings).
4

Find the Cognite Data Fusion entry

Search for “cognite.com” and click the expand icon on the right.
5

Delete site data

Find the entry associated with your specific Cognite Data Fusion organization (for example, acme.fusion.cognite.com) and select the trash can icon (or Delete data).
6

Confirm deletion

Confirm the deletion by selecting Delete.
The next time you visit CDF, the permission prompt will appear again. You must select Allow to restore access.

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Prevent the permission prompt with browser policy

To prevent the permission prompt and ensure uninterrupted access, implement a browser policy change to permanently allow local network access from CDF. Configure the browser policy (LocalNetworkAccessBlockedForUrls) to allow local network access for:
  • The specific URL of your CDF domain: https://acme.fusion.cognite.com (replace acme with your organization name)
  • All CDF subdomains: [*.]fusion.cognite.com

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Policy documentation

Refer to the vendor documentation for browser-specific instructions: