Google Cloud adds firewall to App Engine

Google adds a firewall to its App Engine platform, letting developers restrict apps to certain users or regions, available in beta

Google:  A key security feature for application developers and administrators is to be able to allow or deny incoming requests based on source IP addresses. This capability can help you do production testing without exposing your app to the world, block access to your app from specific geographies or block requests from a malicious user.

Today, we’re thrilled to announce the beta release of Google App Engine firewall. With App Engine firewall, you simply provide a set of rules, order them by priority and specify an IP address, or a set of IP addresses, to block or allow, and we’ll take care of the rest.

When App Engine firewall receives a request that you’ve configured to be denied, it returns an HTTP 403 Forbidden response without ever hitting your app. If your app is idle, this prevents new instances from spinning up, and if you’re getting heavy traffic, the denied request won’t add to your load — or cost you money.

App Engine firewall replaces the need for a code-based solution within your app that still allows requests in, but which can cost you resources and still expose your app.

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