Add ADF outbound access control via Azure Policy to prevent data exfiltration

[Copilot]

Data Factory has no restriction on which external domains its pipelines can communicate with, enabling potential data exfiltration. This adds enforcement via the built-in Azure Policy 3d02a511-74e5-4dab-a5fd-878704d4a61a ("[Preview]: Azure Data Factory pipelines should only communicate with allowed domains") with Deny effect.

adf.bicep

• New allowedStorageAccountNames parameter (array, default []) for storage accounts beyond the private storage account
• Computes the full FQDN allowlist: blob, dfs, and file endpoints for every storage account in scope, plus the Key Vault used by the linked service (using environment().suffixes.keyvaultDns)
• Creates a Microsoft.Authorization/policyAssignments resource scoped to the resource group

var allStorageAccountNames = union([privateStorageAcctName], allowedStorageAccountNames)
var storageAllowedDomains = flatten(map(allStorageAccountNames, name => [
  '${name}.blob.${storageSuffix}'
  '${name}.dfs.${storageSuffix}'
  '${name}.file.${storageSuffix}'
]))
var allowedDomains = concat(storageAllowedDomains, ['${keyVaultName}${keyVaultSuffix}'])

main.bicep

• Passes the public and airlock storage account names to adfModule via allowedStorageAccountNames
• Adds airlockStorageAccountNameForPolicy to resolve the airlock account name without creating a circular dependency through centralizedModule (which itself depends on adfModule.outputs.principalId). For centralized review, the name is extracted from centralAirlockResources.storageAccountId; for spoke-local review, the module output is used directly.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• aka.ms
  • Triggering command: /usr/local/bin/bicep bicep lint research-spoke/spoke-modules/airlock/adf.bicep (dns block)
  • Triggering command: /usr/local/bin/bicep bicep lint research-spoke/spoke-modules/airlock/main.bicep (dns block)
• learn.microsoft.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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