Orbit Uses Trac and Svn in the background for the content of the web server.
Scheduling is done through the internal3 machine, as such we proxy all the requests on to internal3 for scheduling
approval and modifications.
We are running trac 0.11 version, web server is apache2
List of Modules needed to enable orbit Servers

 a2enmod ssl ldap ldap_userdir auth_basic authz_user authnz_ldap dav dav_fs proxy proxy_balancer proxy_http