Is it possible to assign to an ethernet host via DHCP a subnet mask of only the host itself, e.g. 192.168.1.123/32? Do common operating systems support this kind of configuration?
I'd like for the hosts to send all of their traffic to the router (and not directly to some other host on the same segment), but still for them to be able to communicate (so no "client isolation"); effectively creating a point-to-point link, but without any client-side configuration.
Update: My intention is to configure a home router running dd-wrt so that all the traffic has to pass through the IP stack on the router, so it can be filtered by some ipfilter rules. I'd hoped for a general solution, some standard way to implement point-to-point Ethernet connections that still can be automatically configured by DHCP for all commons operating systems.
Based on the responses so far, this doesn't seem to be that easy; I'll read some more about VLANs and then reconsider my plans.