INTERNET/ISP(dhcp server) <--> eth0 my linux box (nas/router) eth1 <--> switch <--> rest of my internet capable devices

So, What I want is for the ISP's dhcp mechanism to work for the devices behind the firewall. Looking at the DHCP protocol (shallowly) I don't see how it could be possible since in the initial broadcast the mac is set and i do not think that the answer would reach my linux box had I put in another mac then eth0's. And settings eth0's would most probably not give me the functionality i want..

if i understand you correctly it will depend on how many ip address's have been assigned to your account.

if like me you are on virgin media(ntl) in the uk you only get 1 ip on your home account. i think there is an account that you can get 5

why not turn you linux machine into a dhcp server as well its not hard. then your nix box can have the isps ip and your network whatever ip you decide, or are you wanting all your machines to have an external ip ?

also you can have more than one ip on eth0. you can alias them like eth0:1 eth0:2
sorry if this is not what you need.

I am allowed 5 IPs. I am no expert in DHCP or ISPs and whether or not it is common practice to allow the same MAC to allocate all 5, I do not know.

One of the main reasons for this setup is since the ISP "arp poisons" the network if I connect them all to a switch, i.e. all off my devices will get the wrong MAC for "my" ip's and all packets will be routed through the ISP effectively blocking some ports even on my own home LAN, as well as limiting bandwidth... pretty idiotic I suppose, not sure what the rationale behind this is, perhaps there is a common switch that me and my neighbors are connected to. Most probably, since when I arp poison the network myself I can read my neighbors traffic, mostly kids sitting on msn etc.. never mind... I only tested this of course to test the security. Anywho,

The linux box is the solution to several problems/features, and hopefully this can be solved without my devices having to be on internal ips, and of course with the IPs delivered by the ISP through DHCP.

*bump*