MicrosoftDuring testing of the Network Service Sandbox Setting in our IT department our developers ran into issues with applications no longer starting for debugging from Visual Studio (browser reported a Timeout). Upon further investigation it turned out that the setting seems to completely block requests to localhost.
We verified this at least with IIS Express (from Visual Studio 2019 and 2022), as well as with the node-js dev-server. We also identified at least one SaaS-application that uses requests to localhost from it's Web Interface to communicate with a locally installed connector application for telephony integration (CTI).
Is this restriction of calls to localhost intentional or something that has simply slipped through so far? Is there some more in depth documentation on what excatly is restricted inside this sandbox (I was unable to find this information through an admittedly short google search).
