Security Basics mailing list archives

Re: DHCP


From: "Tim Clewlow" <tim () clewlow org>
Date: Sat, 23 May 2009 06:05:07 +1000 (EST)


The best way to go about this would be address filtering right? You
should be able to setup an ACL with your allowed mac addresses
getting
IPs and any others being ignored.


DHCP is not a security system.

It is trivial for any *nix system to extract valid MAC / IP pairs
that are currently in use. Then all you have to do is wait for the
traffic to stop and pretend to be that pair.

I repeat, DHCP is not a security system.

Cheers, Tim.

-- 
The code that never executes at all is the fastest.


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