[plug] 4 port nic pci card

[Chris Caston]

On Fri, 2004-05-21 at 09:58, Matt Kemner wrote:
> On Fri, 21 May 2004, quoth Chris Caston:
> 
> > I've just been playing around with this. I bet this is a totally
> > insecure solution for use in a firewall (if it even works, I've haven't
> > tested it fully yet) but under Linux with IP aliasing support built into
> > the kernel you can specify multiple IP's to a single nic using:
> 
> You're right, you shouldn't count on it for security, but it will work
> fine.
> 
> Although you can do the same thing with a single-port NIC and an external
> hub/switch, so really all you save with this "4port" card is not requiring
> an external hub or switch.
> 
> If you want to run seperate networks from the same NIC that you CAN rely
> on for security, get a switch with 802.1Q VLAN support, and compile same
> into your kernel.  That way you can split the switch into multiple
> segments and address them as seperate interfaces on Linux.
> You'll also have the added benefit that broadcast packets only affect
> those hosts that need to receive them, they don't get blasted to all ports
> on the switch.
> 
> > I look forward to someone ripping that suggestion apart :)
> 
> Did I do good? *grin*
> 

Yes very well explained with bonus points for offering a real solution.

I'd also like to thank Craig for his suggestion on how to cleanly
achieve network monitoring to watch a device or system.

thanks,

Chris
>  - Matt
> 
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