I enabled gufw with it's default settings, deny incoming, allow outgoing. I haven't noticed any problems with usability, but I was told that I have to allow incoming UDP traffic from port 68. Do I really need DHCP as a normal user? And if so, do I have to allow incoming traffic from port 68 for proper functionality? What would happen if I didn't?
Finally, if I do have to allow incoming UDP traffic from port 68, would I be able to specify it to only allow traffic from say 192.168.1.1? Or would that still effect the functionality?