Re: Stopping Arp poison attacks

["Kurt Seifried" <bt () seifried org>]

> Hello there,
>
> I am not a networking expert, but in my work as a pentester i often use 
> arp poison attacks to intercept interesting traffic.
> If i recommend our customers to bind the MAC addresses of mission critical 
> servers' network interfaces to their respective ports on the routers and 
> switches, does that migitate most of the threat or am i missing something 
> important?

The client side subnet. You've secured the server end, which will prevent an 
attacker connected to the same switch the server is connected to from 
hijacking on that subnet. However let's say floor 5 subnet, I simply go 
"heck ya, I got the ARP for ip 1.2.3.4 (which corresponds to the host 
fileserver.example.com). The traffic never makes it off the subnet (unless 
of course the attacker wants it to).

> Thanks in advance for your reply.
>
> Peter.

-Kurt 


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