I will revisit the documentation regarding Firewalls later to better my understanding.
for your first steps:
#lokkit #redhat-config-securitylevel --> /etc/sysconfig/iptables
#iptables-save >/path/to/save #iptables-restore </path/to/save
#vi /path/to/save
#service iptables
#man iptables
#iptables -t filter -L (default-table) #iptables -t nat -L #iptables -t mangle -L
-- shrek-m