[Mesh] Changing your MAC address

[Adrian Chadd]

TCP sessions get reset when you get a new lease on a different IP.

Hopefully short lease times comes with giving you the same IP if you
stay connected and keep re-acquiring leases. But I've encountered
equipment that doesn't.



-a


On 20 November 2013 13:47, Steve Berl <steveberl at gmail.com> wrote:
> It makes a lot of sense that a network with MAC hopping devices would need a
> DHCP server with short lease times.
>
> How do short lease times impact devices that are not changing their MAC
> addresses?
>
> -steve
>
>
> On Wed, Nov 20, 2013 at 12:18 PM, Yardena Cohen <yardenack at gmail.com> wrote:
>>
>> Inspired by last week's conversation, I experimented with MAC
>> randomization on my laptop. And I DoS'd my own network by exhausting
>> its DHCP pool.
>>
>> My very naive script reset the MAC after every network hiccup, so the
>> router kept seeing an entirely new device and giving it a new IP
>> address. Slowly. Until they were all gone. I "solved" my problem the
>> stupid way by rebooting the router and lowering the DHCP timeout from
>> 24 to 3 hours.
>>
>> A production script would be clever about resetting it only on new
>> associations, and not on every brief reassociation. However, still
>> something to keep in mind when deploying networks that encourage this
>> sort of thing. ;)
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>
>
>
>
> --
> -steve
>
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