You could also replace Rou1 and Rou2 in your diagram with a single router with multiple NICs, no?
And as long as you're doing that, you almost may as well use 3 NICs and dump the DSL router -- making this a relatively standard firewall setup... -hp3 On Thu, 2003-10-09 at 10:21, Volker Tanger wrote: > Greetings! > > On Thu, 9 Oct 2003 17:25:46 +0300 "M. Civan CAMKIRAN" <[EMAIL PROTECTED]> > wrote: > > > I have two networks which belong to two different companies in a > > building and one broadband internet connection. I decided to buy an > > inexpensive 4 port router and plug each hub to 2 of the 4 ports on > > this router. Questions are: > > Please define "inexpensive 4port router": > > - a cheap (DSL) router with builtin 4port switch/hub, thus effectively > only a 2port router with the second port multiplied by an internal > hub/switch (usually in the $50+ range) > > - a router with 4 full/independent LAN/WAN interfaces (e.g. Cisco 26xx, > usually above $1000) > > > > 1. Is it possible to have both networks use the same internet > > connection in this way? > > Yes - but usually the cheap DSL routers don't allow multiple independent > networks on the inside interface/hub. > > > > 2. Is it possible to prevent the computers see the other network's > > computers? If yes, how? > > Full router: yes, just set the proper ACLs. > DSL router with hub/switch: no > > Depending on your brand, cheap broadband routers MIGHT be able > (depending on built-in options) to do just routing ethernet/ethernet. If > so, you'd need two more routers, each one hiding the individual company > network, then connecting to the common DSL router. ASCII art below: > > > WWW > | > | > DSLrouter > | | > | | > Rou1 Rou2 > | | > | | > --+-- --+-- > LAN1 LAN2 > > > You'd be probably better/cheaper off with a multiport (!) DSL-enabled > firewall... > > Good luck! > > Volker Tanger >
