Problem Definition

In Bamboo, Application Tunnel only works with Jira cloud integration.

Suggested Solution

Support Application Tunnel Between all Atlassian Cloud Products (Bitbucket, Confluence, etc)

Why this is important

Application tunnels provide a secure pathway between your Atlassian cloud organization and Data Center or Server instances that live in your network. This pathway can be used to integrate your products through application links that would otherwise require allowing incoming connections to your network. Thanks to network tunneling, you can integrate your Atlassian products and exchange data and functionalities between them in a secure way, without exposing your network or allowlisting any incoming connections or IPs.

Quote from https://support.atlassian.com/organization-administration/docs/what-are-application-tunnels/