Yes, there is.
By default, it is disabled. To enable it, you will need to add the following to your intigua.properties file (/usr/share/tomcat/default/conf/intigua.properties) and fill in the details for proxy host and port
Note1: tomcat restart is needed to apply the changes
Note2: If your proxy works on certificate based communication, then import the proxy certificates into the following location
After importing the certs, change the permissions
sudo chown tomcat.tomcat *
sudo chmod ug+r *