Firestarter Configuration

[Kumara]

Greetings! to all,
I installed Firestarter without any errors. but I don't know how to
configure it.
1. what is the convention making a host name (ip,hostname), pls give me an
example
2. How do I configure clients machines for web (IE and Mozilla Firefox)? pls
i need some examples.
3. i have no idea of iptables, what is the job i have to do on it? is it
related to Firestarter too?

I am still new to Linux. so, i highly appreciate your briefs instead of
links ( I need links too). your words give me good impression than  reading
a how to.
Thank you in advance
Mohan