› Forums › Network Management › Firewall, Traffic Shaping and Net Balancer › What are basic firewall settings for home router / gateway? › Reply To: What are basic firewall settings for home router / gateway?
Well…if I were an expert or even power user of iptables and the network filtering used in the latest linux kernels I would give you better answers. I think that when you are using NAT it makes a difference.
From the article I pointed to and my own experimentation, INPUT to ppp0 includes all traffic coming from the internet. This is why default rule of input drop is needed to get a stealth passed result on the shields up test. This interface is also NAT enabled.
An example of forwarding I know of is where you want to block clients on the lan from communicating to other DNS servers on udp port 53, so you add a rule to drop those matching packets on the forward chain.
Sorry I cannot give you more definitive answers / references.