Block sites from making network requests to the local device.

Specifies a list of URL patterns for which requests initiated from matching origins to loopback addresses (127.0.0.1, ::1, localhost) are blocked from issuing Local Network Access requests.

If a requesting origin matches a URL pattern specified in this policy, requests to loopback addresses are blocked.

For origins not covered by this policy, the user's personal settings and local network access restrictions apply.

Multiple policies can specify origins that affect requests to the local device. If an origin matches more than one of the following policies, they are applied in the following order of precedence:
- LoopbackNetworkBlockedForUrls
- LoopbackNetworkAllowedForUrls
- LocalNetworkAccessBlockedForUrls
- LocalNetworkAccessAllowedForUrls

Note: This policy improves local network security by blocking specified public websites from accessing loopback addresses. It helps prevent unauthorized external sites from reaching local services running on the device unless explicitly permitted.

For more information about Local Network Access, see https://wicg.github.io/local-network-access/

Example value:

http://www.example.com:8080
[*.]example.edu
*