I wanna learn about iptables but don’t know where to start, this post perhaps will be my collection of link around iptables.
Perhaps I can learn it by doing
Tutorial :

Frozentux iptables tutorial (cool)
Using Linux iptables or ipchains to set up an internet gateway / firewall / router for home or office
Serve Path Iptables
Secure your [...]

Click here to read more from ipchain