Re: Blocking Access to Non-domain computers

[andreas () inferno nadir org]

Hello,

On Tuesday 31 August 2004 17:57, Thomas TS wrote:
> On Sun, 2004-08-29 at 19:51 +0100, Barrie Dempster wrote:
> > Your only option for restricting DHCP access is to use MAC address
> > filtering (which is trival to bypass) although if you combine this
> > with IPSEC,
>
> So, now I am "just curious" about how to lie a MAC to get thought a MAC
> access list barrier...
>
> Could you give a proof-of-concept description on this matter ?

Sure. Sniff the wire for a valid MAC. On linux, you may simply 
execute the command 'ifconfig hw ether <MAC addr>' 
to "spoof" your MAC address. 
On Windows you need to write (imho) a simple C script to achive the same.

regards,
Andreas


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