Configure deployment credentials for Azure App Service
To secure app deployment from a local computer, Azure App Service supports two types of credentials for local Git deployment and FTP/S deployment. These credentials are not the same as your Azure subscription credentials.
User-level credentials: one set of credentials for the entire Azure account. It can be used to deploy to App Service for any app, in any subscription, that the Azure account has permission to access. It's the default set that's surfaced in the portal GUI (such as the Overview and Properties of the app's resource page). When a user is granted app access via Role-Based Access Control (RBAC) or coadmin permissions, that user can use their own user-level credentials until the access is revoked. Do not share these credentials with other Azure users.
App-level credentials: one set of credentials for each app. It can be used to deploy to that app only. The credentials for each app are generated automatically at app creation. They can't be configured manually, but can be reset anytime. For a user to be granted access to app-level credentials via (RBAC), that user must be contributor or higher on the app (including Website Contributor built-in role). Readers are not allowed to publish, and can't access those credentials.
The Development Center (Classic) page in the Azure portal, which is the old deployment experience, will be deprecated in March, 2021. This change will not affect any existing deployment settings in your app, and you can continue to manage app deployment in the Deployment Center page.
Configure user-scope credentials
Run the az webapp deployment user set command. Replace <username> and <password> with a deployment user username and password.
- The username must be unique within Azure, and for local Git pushes, must not contain the ‘@’ symbol.
- The password must be at least eight characters long, with two of the following three elements: letters, numbers, and symbols.
az webapp deployment user set --user-name <username> --password <password>
The JSON output shows the password as
Use user-scope credentials with FTP/FTPS
Authenticating to an FTP/FTPS endpoint using user-scope credentials requires a username in the following format:
Since user-scope credentials are linked to the user and not a specific resource, the username must be in this format to direct the sign-in action to the right app endpoint.
Get application-scope credentials
Get the application-scope credentials using the az webapp deployment list-publishing-profiles command. For example:
az webapp deployment list-publishing-profiles --resource-group <group-name> --name <app-name>
For local Git deployment, you can also use the az webapp deployment list-publishing-credentials command to get a Git remote URI for your app, with the application-scope credentials already embedded. For example:
az webapp deployment list-publishing-credentials --resource-group <group-name> --name <app-name> --query scmUri
Reset application-scope credentials
Reset the application-scope credentials using the az resource invoke-action command:
az resource invoke-action --action newpassword --resource-group <group-name> --name <app-name> --resource-type Microsoft.Web/sites
Disable basic authentication
Some organizations need to meet security requirements and would rather disable access via FTP or WebDeploy. This way, the organization's members can only access its App Services through APIs that are controlled by Azure Active Directory (Azure AD).
To disable FTP access to the site, run the following CLI command. Replace the placeholders with your resource group and site name.
az resource update --resource-group <resource-group> --name ftp --namespace Microsoft.Web --resource-type basicPublishingCredentialsPolicies --parent sites/<site-name> --set properties.allow=false
To confirm that FTP access is blocked, you can try to authenticate using an FTP client such as FileZilla. To retrieve the publishing credentials, go to the overview blade of your site and click Download Publish Profile. Use the file’s FTP hostname, username, and password to authenticate, and you will get a 401 error response, indicating that you are not authorized.
WebDeploy and SCM
To disable basic auth access to the WebDeploy port and SCM site, run the following CLI command. Replace the placeholders with your resource group and site name.
az resource update --resource-group <resource-group> --name scm --namespace Microsoft.Web --resource-type basicPublishingCredentialsPolicies --parent sites/<site-name> --set properties.allow=false
To confirm that the publish profile credentials are blocked on WebDeploy, try publishing a web app using Visual Studio 2019.
Disable access to the API
The API in the previous section is backed Azure role-based access control (Azure RBAC), which means you can create a custom role and assign lower-priveldged users to the role so they cannot enable basic auth on any sites. To configure the custom role, follow these instructions.
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