Blocking of Requests Due to Salesforce Origin Shielding

Salesforce is making a series of changes to protect the Commerce Cloud instance origin, due to but not limited to mitigating the risk of malicious traffic to the origin. As a consequence of this specific traffic to endpoints on the origin (hosts ending with *.demandware.net) will be blocked unless explicitly whitelisted. See more details in the general announcement at https://help.salesforce.com/s/articleView?id=000364472&type=1

As of today, Origin Shielding is present on B2C Commerce production and development instances.

The CLIs commands making Data API requests are NOT being impacted by that, as in Data API requests made to the origin through *.demandware.net hostnames are being whitelisted by default.

As a consequence, you don't have to change any of your build scripts or related tools which make use of CLI commands when working with B2C Commerce instances.