Blocking outgoing traffic for all applications except the ones that need the Internet can make a difference, especially under Windows. For example, some applica

Blocking outgoing traffic for all applications except the ones that need the Internet can make a difference, especially under Windows. For example, some applications like to phone home for no benefit to the user and there is sometime no option to turn it off. The option to block traffic per-application in Linux is no longer included in iptables (I think it was the switch --cmd-owner )