I have a router in my home, to which there are several devices connected to it (over Wi-Fi and Ethernet) and get the network information through DHCP. I want to configure the protocol, so I can provide an entry in the routing table distributed to every connected device. I look for a general way, because I understand every router is different, but also my model is CBN CH6643E from Vodafone/ONO (Spain).
My question is: how do I do that? are these household routers intended/allowed to do this?. Note that I don't pretend to manually edit the routing table of the devices but alter the table they receive in their DHCP configuration.
Also: I have a Linux distribution and soon I will have a microcomputer (raspberry-like) capable of running Linux too, in case there's a solution that requires it.
EDIT: The most viable solution is to use a DHCP server in a computer, that will be in the middle of the router and connected devices. How would that affect the defaut gateways of the connected devices and the default gateway of the DHCP server? The entry that I want to add to the devices' routing tables is a new default gateway that will redirect their packages to my router, as it's not possible to do that directly in the router.
Someting like this:
to the internet <====|router|====|DHCP server|====devices