"Iptables is a firewall, installed by default on the Ubuntu Server."
https://help.ubuntu.com/community/IptablesHowTo
For more information, see "Netfilter/iptables":
http://en.wikipedia.org/wiki/Iptables
"Iptables is a firewall, installed by default on the Ubuntu Server."
https://help.ubuntu.com/community/IptablesHowTo
For more information, see "Netfilter/iptables":
http://en.wikipedia.org/wiki/Iptables