Network Numbering Problem, 3-4 nics instead of Hub

[Johnny Smith]

--- "Ed K." <ed at hp.uab.edu> wrote:
> On Wed, 13 Apr 2005, Johnny Smith wrote:
> > Hallow all,
> >
> > I have a network numbering/routing question.
> >
> > I have a pretty standard home network with a linux
> > firewall/NAT box feeding a
> > hub to what is is usually 3-5 machines.
> >
> > Can I eliminate the hub and use 3+ nics on the
> > firewall box and
> > 'how' would I number them???
> >
> > I have set this up once before but I find that
> > the various hosts connected to the firewall can
> not
> > see or access each other, but all can access the
> net.
> >
> > what am I doing wrong below ?
> >
> > Internet==> firewall/NAT Machine [with multiple
> Nics
> > and CrossOver CAbles to Hosts] ==>
> >
> > ==>  eth0  [ 10.0.0.1/255.0.0.0]  ==>
> > host-1 eth0= 10.0.0.2/ 255.0.0.0
> >
> > ==>  eth1  [ 172.16.0.1/255.255.0.0] ==>
> > host-2 eth0= 172.16.0.2/255.255.0.0
> >
> > ==>  eth2  [ 192.168.0.1/255.255.255.0] ==>
> > host-3 eth0= 192.168.0.2/255.255.255.0
> >
> >
> > The method above did now allow each host to see &
> > access each other, they could access the internet.
> >
> >
> >
> > Could the following Alternative Numbering Work ??
> >
> > Internet==> firewall/NAT Machine
> > [with multiple Nics and 'CrossOver Cables'
> > to 'multiple' Hosts] ==>
> >
> > ==>  eth0  [ 172.16.0.1.255.255.0.0]  ==>
> > host-1 eth0= 172.16.0.2/255.255.0.0
> >
> > ==>  eth1  [ 172.17.0.1.255.255.0.0]  ==>
> > host-2 eth0= 172.17.0.2/255.255.0.0
> >
> > ==>  eth2  [ 172.18.0.1.255.255.0.0]  ==>
> > host-3 eth0= 172.18.0.2/255.255.0.0
> >
> > Thanks in advance for any guidance you can give
> me.
> >
> > Johnny
> >
> 
> I have a suggestion, use brctl
> http://bridge.sourceforge.net/howto.html
> 
> and bind eth0, eth1, and eth2 to the same logical
> device (br0) and then 
> the three nics act like a three port bridge. You
> only configure one 
> ethernet device (br0) for all three hardware ports.
> 
> ed


Thanks Ed,

I checked the url and wow, I didn't realize I could
solve the problem with a bridge.  Very cool.
I'm going to build a new machine over the next couple
of days with 3+ nics... let ya know how it goes.
Looking forward to it.

Johnny










		
__________________________________ 
Do you Yahoo!? 
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/