Installing CPanel 5.0 for RedHat 8.0 - Rsync Help/Proxy Help

I want to install cpanel on redhat 8.0. the problem is that the computer I want to install to, isn't directly connected to the internet. It connects through another computer with port 80 and other needed ports mapped to that computer. How do I go about installing cpanel when I run the installer it hangs on the rsync thing because it can't access the internet?



-Chris