I have a Bell home router that doesn’t support port forward ranges , just single ports. It does have DMZ though so....
I was thinking of having my Ubuntu 14 headless run a DHCP service and then doing my thing and forward the ports that way. ( Have the Bell router DMZ to the IP of the Ubuntu Server as it already has 2 NICs.)
Then the devices that I need to use port forward ranges I will give static IPs pointing to the Ubuntu DHCP
Other devices like my phone , tablets etc I don't care what DHCP server they get there info from.
Or... Is this a bad idea?