What are the rules that decide what goes into the initial /etc/hosts file of a a server with these characteristics?
It has a internal IP address for the internal subnet. which is in the 172.20.x.x range
It has a public facing IP address which has a 1 to 1 mapping with the internal IP address
ifconfig only shows the internal IP address, which is 172.20.x.x,which doesn't seem to be part of the range reserved for internal networks (which is what has me somewhat confused)