# Networking {% hint style="info" %} This page was generated from content adapted from the [AWS Developer Guide](https://github.com/awsdocs/aws-app-runner-developer-guide.git) {% endhint %} ## Outgoing traffic * **Note**\ The following traffic isn't affected when you associate your service with a VPC:\ **Inbound traffic** – Incoming messages that your application receives are unaffected by an associated VPC. The messages are routed through the public domain name that's associated with your service and don't interact with the VPC. **App Runner traffic** – App Runner manages several actions on your behalf, such as pulling source code and images, pushing logs, and retrieving secrets. The traffic that these actions generate isn't routed through your VPC. * **Note**\ A few Availability Zones in some AWS Regions don't support subnets that can be used with App Runner services. If you choose subnets in these Availability Zones, your service fails to be created or updated. For these situations, App Runner provides a detailed error message pointing to the unsupported subnets and Availability Zones. Remove the unsupported subnets from your request and try again. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://awsnotes.dendron.so/containers/aws-app-runner/common/networking.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.