Disable and Enable firewall in Jaunty

hi frnds..
there is no firewall in ubuntu before 8.04 version, But from 8.04 and + , firewall is there. So for some experimental purpose you have to disable firewall.

for Disable folllow : sudo ufw disable

for Enable follow :$ sudo ufw enable


or you can follow the Below link:

https://wiki.ubuntu.com/UbuntuFirewall