> ## Documentation Index
> Fetch the complete documentation index at: https://docs.anonalabs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# FAQ

> Short answers to common questions.

> [accordion] Do I need to rewrite my E2B code?
>
> No. Set `E2B_DOMAIN=compute.anonalabs.com` and an Anona API key. See [Migrate from E2B](https://docs.anonalabs.com/compute/migrate-from-e2b.md) for the features that are not available yet.

> [accordion] Is a sandbox a container?
>
> No. Each sandbox is a KVM microVM with its own kernel. See [Security](https://docs.anonalabs.com/compute/concepts/security.md).

> [accordion] How long can a sandbox run?
>
> On paid plans, as long as you want: create it with `timeout=-1`, and let it pause when idle. On the free plan, up to one hour. A paused sandbox costs no CPU or memory. See [Lifecycle](https://docs.anonalabs.com/compute/concepts/lifecycle.md).

> [accordion] What happens to running processes when I pause?
>
> They are frozen with the sandbox's memory and carry on after resume.

> [accordion] Can a sandbox reach the internet?
>
> On paid plans yes, by default; on the free plan no. Private networks and cloud metadata are always blocked. You can restrict each sandbox further. See [Networking](https://docs.anonalabs.com/compute/concepts/networking.md).

> [accordion] Can I run Docker inside a sandbox?
>
> The `coding-agent` template has the Docker CLI but no daemon. Running a Docker daemon in a sandbox is not supported yet.

> [accordion] Can I bring my own image?
>
> Yes: build one from a Dockerfile with `anona-compute template build`, or with the E2B SDK's `Template.build`. See [Templates](https://docs.anonalabs.com/compute/concepts/templates.md#build-your-own).

> [accordion] Can I choose the CPU and memory?
>
> Not per sandbox: a sandbox gets its template's size. See [Templates](https://docs.anonalabs.com/compute/concepts/templates.md).

> [accordion] How is it billed?
>
> By active vCPU time, resident memory, snapshot storage and egress. During the preview nothing is charged. See [Pricing](https://docs.anonalabs.com/compute/pricing.md).

> [accordion] Where does it run?
>
> AWS `us-east-1`. See [Regions and limits](https://docs.anonalabs.com/compute/concepts/limits.md).


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