I want to block all incoming and forwarding connections, except those necessary for everyday use. I had tried that, but it I lose connection to the internet, so obviously there are some exceptions, what are they? I thought just blocking them would be enough, but I need some exceptions .

In summary, I'm looking for exceptions that will allow me to connect to the internet with minimal exceptions used. If it helps, the laptop uses DHCP and uses a network printer. That's pretty much the only things I would see being needed. Any help is greatly appreciated.

Have you looked into iptables? how are you trying to limit connectivity?

Sorry, that was what I meant. I want to do this using iptables. I tried using "iptables -P INPUT DROP" and "iptables -P FORWRAD DROP", but I lost connectivity to the internet, so obviously their are some exceptions which I'm not sure of.

well, the FORWARD rule is unrelated if you're not doing forwarding - and it doesn't sound like you are... but check with a:as for the "iptables -P INPUT DROP", you are correct in that you'd need a couple rules in order for that to work... they are:just my ...

Thank-you, worked like a charm and it's exactly what I needed . Thanks again .