Recently, I needed to install JIRA (5.2.2) and Confluence (4.3.5) on CentOS (6.3). Atlassian documentation is pretty straightforward but I was struggling for some time with my specific configuration that is not so common (I think). Im using Apache as a reverse proxy to JIRA / Confluence tomcats. Jira is running on :8080 and Confluence on :8090. Apache is using SSL and both Tomcats only http.