Date: 2012oct3 OS: Linux Distro: pre Fedora22 Warning: Basically obsolete info. Use firewalld if available. Q. How can I configure my firewall when logged in thru a terminal window? A. The service is called iptables -- not firewall or anything similar. Fedora 22 and later, this is different. CONFIGURE You can modify file /etc/sysconfig/iptables and do

systemctl restart iptables

Or use the text-based GUI:

system-config-firewall-tui

Install that via:

yum install system-config-firewall-tui

ENABLE If you want it to start when the machine boots:

systemctl enable iptables

LIST To see the current rules:

iptables -L