When you you wish to run multiple services bound to different IPs possibly under different subnets from a single machine the simple way is to create multiple virtual adapters tied to a single physical card. The following instructions are for CentOS but should also work for RedHat and Fedora.

We provide Oracle administration support on GNU Linux Servers. One of our customers had us set up a new Oracle XE server for them on CentOS. We set up everything and had the system up and running fine. We had also tested everything on the server and verified connection status from clients. Two days after installation we got a call from the customer that he could not open the Oracle XE web administration interface and he was getting an access denied, page not found error on http://127.0.0.1:8080/apex