NAT and Redhat 8.0

[Engstrom_Carl emc com]

Is there an easy way to turn NAT on with redhat 8.

I have it setup stock with 2 Nics, one pointed at the cable modem and the
other at my internal lan...I have the medium firewall stuff started... and
now I'd like to offer up addresses to my internal network (192.168.100.xxx)

Thanks

Carl Engstrom