You can have no ingress rule on the Security Group assigned to the Bastion host.

If your proxy server requires authentication check with your IT Administrator/Network Administrator if this can be by-passed for https, or for this specific destination only. The only required network rule for the Bastion is a public access to the internet via an Internet Gateway. The easiest way to create such a file is to go to Preferences-> Sharing over the net->Search the internet in calibre, create the URLs and export them. In addition, Bria does not support a proxy server that require authentication. (Bria does not support for auto-configuration of proxy servers, either via script or auto-detection.) You must use the 'Use a proxy server for your LAN' option.In Windows, go to the Control Panel > Internet Options > Connections > LAN settings. If your network uses a proxy server to get HTTPS connections to the Internet, then the proxy server must be configured manually.Inform your IT Administrator/Network Administrator that the application needs to be able to connect to:.The 'License Server Unreachable' indicates that there is a firewall or other security mechanism preventing this connection. When Bria needs to activate its license key it has to establish a secure connection to our License Server.

Calibre server unreachable on internet