I'm attempting to configure a firewall on my laptop that allows for routing. The main trick is, I don't want to allow for connections to be made that do not fall under the ESTABLISHED,RELATED condition to be blocked on the wlan0 interface. As a redundancy, apart from defining the drop all rule tradition, I also would like to deliberately define:
$ sudo iptables -A INPUT -i wlan0 -p tcp -m --dport 0:65535 -j DROP
This will naturally will be defined for both udp and IPv6
If I implement that definition, would this hinder the routing capabilities of my laptop?