I am truly a newbie to linux as well as computers.

My question is what firewall that comes together with fedora core 6 ?

A billion thanks to any help.

Thanks for your help.

Your help is greatly appreciated by me and others.

iptables is the "firewall" (also a GUI called firestarter is available to interact with it).

man iptables
Will give you all sorts of details about the iptables command.

iptables -L
Will show you your current rules.

service iptables stop
Will turn off iptables (useful for testing to see if iptables is what is blocking you from doing things).

service iptables start
Will turn iptables back on.

In addition to iptables you have SELinux which is an NSA sponsored security mechanism like a firewall on steroids. Many people simply disable SELinux as it is difficult to manage and causes a lot of problems if not properly configured.

Thanks for your help. I feel better undestanding about linux and fedora core 6.