802.1X is the standard way to solve this problem, it obviously comes with
management overhead but your switch does support it.

Regards,

Jared brick

On Wed, Aug 11, 2010 at 4:48 PM, David <[email protected]> wrote:

>
> At $work, we're having more and more problems with people bringing
> laptops etc from home and plugging them in to the network.  The company
> policy has always been against this, but it was never really enforced.
> I want to change that.
>
> I'm looking for suggestions on how I can prevent user's personal devices
> from functioning should they plug them into the network.
>
> Here is what  I have to work with:
> - the MACs of the company workstations/laptops/Voip phones
> - Switches are 3Com Baseline 2924-pwr Plus
> (
> http://support.3com.com/infodeli/tools/switches/baseline/3Com_Baseline-Switch-2924-PWR-Plus_User-Guide.pdf
> )
> - IPs are assigned via dhcp (ISC dhcpd).  Some equipment gets fixed IPs,
> but workstations and voip phones are plain dhcp.
>
> I stopped assigning static ips to the workstations and voip phones
> because it was becoming a pain to manage at 100+.  However, I'm starting
> to wonder if I should assign all known mac addressed to a fixed range,
> and assign a second range by dhcp.  Then when an unknown client "plugs
> in", they will get an IP in the dhcp range, which I should be able to
> block at the switch.
>
> Comments?
>
>
>
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