Prerequisites

• Node.js^* (v22.13.0) 👉 [Download]
• pnpm^* 👉 npm install -g pnpm
• Azure App Configuration^*
• VPN^* 👉 To simulate the issue
• Azure Blob Storage 👉 Optional its just to demonstrate the issue is with app config

Azure App Configuration settings

• All networks, including the internet and private endpoints, can access this resource.
• Access keys is enabled
• Some configuration settings are added in order to read them

GetStarted

1. pnpm install
2. Activate a VPN
3. APP_CONFIG_ENDPOINT=https://REPLACE_ME.azconfig.io pnpm start 👉 💥
4. BLOB_PREFIX= BLOB_SRV_ENDPOINT=https://REPLACE_ME.blob.core.w indows.net/ BLOB_CONTAINER=REPLACE_ME pnpm blobStorage 👉 🚀 Demonstrating the issue is with the @azure/app-configuration
5. Deactivate VPN
6. APP_CONFIG_ENDPOINT=https://REPLACE_ME.azconfig.io pnpm start 👉 🚀
7. BLOB_PREFIX= BLOB_SRV_ENDPOINT=https://REPLACE_ME.blob.core.windows.net/ BLOB_CONTAINER=REPLACE_ME pnpm blobStorage 👉 🚀

So as soon as a VPN is deactivated both the @azure/app-configuration and @azure/storage-blob works as expected. But as soon as the VPN is activated @azure/app-configuration fails to read the configuration settings.