If your Bamboo instance is running behind a firewall, the add-on will reuse the proxy configuration from the Atlassian host application.
- See Cannot connect to an AWS or EC2 instance when the Bamboo application is running behind a proxy for details.
Please note that the AWS API calls use SSL throughout, so the add-on relies on the respective system properties https.proxyHost and https.proxyPort to be available from the Java Virtual Machine (JVM). Depending on your environment, you might need to set these https.* variations explicitly in addition to the usual http.* ones.
- See How to Configure an Outbound HTTP Proxy for JIRA for details (while documented for JIRA, this information applies to Bamboo too).