# Settings and Configuration

This section describes settings and configuration options you can change inside Evon Hub. All settings can be adjusted via the Web UI or API.


__EC2 IAM Role Status__

_Visibility: Only on Hubs deployed via AWS Marketplace_

This provides a read-only health check (green/red icon) indicating the health status of your EC2 IAM Role. Green indicates that the AWS IAM Role attached to the instance is configured correctly which is required for the Hub to function correctly. Details about how to setup your IAM Role is provided in the deployment instructions in AWS Marketplace.

__Timezone__

_Visibility: Only on Hubs deployed via evonhub.com or AWS Marketplace_

The local timezone for your Hub (default: UTC)

__Auto update__

_Visibility: Only on Hubs deployed via evonhub.com or AWS Marketplace_

A chkecbox indicating if the Hub should automatically apply updates (default: On). The WebUI and the Evon API may become unavailable for a few minutes during the update process, but connected Users and Servers using the overlay network will not be affected.

__Auto update time__

_Visibility: Only on Hubs deployed via evonhub.com or AWS Marketplace_

The auto update start time of day, in the provided Timezone.

__Discovery mode__

_Visibility: Always_

A checkbox setting to enable/disable Discovery mode. Disable to prevent any new Servers from joining your overlay network unless its UUID is whitelisted.

__UUID blacklist__

_Visibility: Always_

A comma separated list of Server UUID's that will be disallowed from connecting. Note that any currently connected Server with a UUID specified here will be forcibly disconnected and deleted.

__UUID whitelist__

_Visibility: Always_

A comma separated list of Server UUID's that will allowed to connect even if discovery mode is disabled. Currently connected servers do not need to be added here as the Hub will always permit existing Server UUID's to connect. To block an existing server from the Hub that you are unable to uninstall the Bootstrap script on, add its UUID to the UUID blacklist above.