Re: Ping a mac address

["Thor (Hammer of God)" <thor () hammerofgod com>]

Right--- agreed on all points-- I should have reworded "in the first place" 
using L2 and L3 distinction as you did.  I was just pointing out that the 
solution all depends on what device we're working with and what the end to 
the mean is.  Kind of hard to do when all the OP gives us is "I want to Ping 
a MAC address ;)

Oh, and the units are pretty cool- those old Axis cameras.  There was an 
access point that allowed you to do the same thing (config with arbitrary IP 
via ARP) but I don't have it anymore.  I'll try it on some of my LinkSys and 
NetGear boxes and see if they let me do that as well.  Ya never know unless 
you try ;)

t




----- Original Message ----- 
From: "Cedric Blancher" <blancher () cartel-securite fr>
To: "Thor (Hammer of God)" <thor () hammerofgod com>
Cc: "Roni Bachar" <roni () avnet co il>; <pen-test () securityfocus com>
Sent: Sunday, December 04, 2005 11:31 AM
Subject: Re: Ping a mac address


Le dimanche 04 décembre 2005 à 10:39 -0800, Thor (Hammer of God) a
écrit :
> All packets are not automatically dropped if the IP doesn't match the
> bound IP -- -- that's what the MAC is for in the first place.

At least they should, unless the device is a router, in what case
packets get routed.
I don't get your point about the MAC address being for "in the first
place"... MAC addresses are for ensure L2 connectivity. L3 is only
relying on L3 addressing, i.e. IP, whatever L2 you're using. If you use
the wrong IP address, then the device has wether to drop or route the
packet. Period.

Speaking of unicast IP addresses, of course...

> For instance, I have a few IP cameras around my infrastructure... If
> I add a static ARP entry for the MAC to some arbitrary IP (that's still on
> my subnet) I can use that arbitrary IP to access the unit's HTTP
> configuration... works just fine.

You're lucky to be facing theses non RFC compliant devices :)))


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