On 01/10/2010 09:34 AM, David Hláčik wrote: I am very confused by: a) My "router" has 1 interface eth0 - so err.. you're trying to run 2 networks on same eth0 ? b) The DSL modem is not natting - yet its IP on LAN side is RFC 1981 I'd suggest clearly laying out your network - perhaps others understand what your doing/trying to do .. but I for one dont.