For more about this, see https://confluence.atlassian.com/display/DOC/Using+Apache+with+virtual+hosts+and+mod_proxy
Here my config to pass to my Atlassian JIRA (Confluence is same, same), that runs on the server, port 8080.
The "Deny from 80 10.40.62.77" is actually to stop a spammer identified from that IP Address
<VirtualHost *:80> ServerAdmin bnp@mos-eisley.dk ServerName jira.mos-eisley.dk ServerAlias jira ProxyPass / http://jira.mos-eisley.dk:8080/ ProxyPassReverse / http://jira.mos-eisley.dk:8080/ <Proxy *> Order Allow,Deny Allow from all Deny from 80 10.40.62.77 Deny from none </Proxy> </VirtualHost>
This also requires 3 extra parameters (scheme,proxyName,proxyPort) to the Tomcat's server.xml; otherwise JIRA complains
<Connector port="8080" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" connectionTimeout="20000" enableLookups="false" maxHttpHeaderSize="8192" protocol="HTTP/1.1" useBodyEncodingForURI="true" redirectPort="8443" acceptCount="100" disableUploadTimeout="true" scheme="http" proxyName="jira.mos-eisley.dk" proxyPort="80"/>