[LUNI] MAC address spoofing

[zfh]

--- "Keith T. Garner" <kgarner at kgarner.com> wrote:

> On 9/8/07 7:17 PM, zfh wrote:
> > I have been playing with IP address spoofing on
> > Scientific Linux (a distribution similar to Red
> Hat
> > Enterprise).  I can use ifconfig to bring the
> > interface down and change the mac address. (I was
> > using a MAC address from another system on my
> network,
> > which I brought up to see the MAC address and then
> > shut down before trying the spoofing.)  When I
> bring
> > the interface back up, you would think it would
> grab a
> > different IP address from the network DHCP. 
> Instead,
> > it either keeps the old IP address (which doesn't
> > work), or it doesn't get an IP address at all. 
> When I
> > restart, the real MAC address comes back and all
> works
> > fine.  Am I missing something?
> 
> What ISP are you working with?
> 
This is on my own internal network.  I have a Debian
sarge box that provides DHCP services to my internal
network and acts as a bridge to my DSL.