I am going to be setting up a new Ubuntu server with ISPconfig on. It will be in a local DMZ behind a strict firewall (default block). I can setup the inbound rules for the sites I'll be hosting easily but I don't know what outbound access ISPconfig needs. That is the URLs it will need access to to download and install itself and the URLs (possibly the same) it will need to access to get updates. eg download servers and any custom repos it will access? Looks like the install script is hosted on ispconfig.org so I will permit "*.ispconfig.org" this but I don't know if this is all?