DHCP through RAS

From: Jason Humes (jhumes_at_acs.on.ca)
Date: 03/01/04

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    To: "'focus-ms@securityfocus.com'" <focus-ms@securityfocus.com>
Date: Mon, 1 Mar 2004 16:31:03 -0500

    Hi
    We provide access-controlled internet in a public area through the use of an
    access-controller. Usernames for authentication to the AC are given out
    manually and IPs are distributed via W2K DHCP Server. The problem is that
    we don't want users installing access-points or other access mechanisms onto
    the network and doing some second level sharing of the internet feed. I
    mean, if I look at the DHCP server leases, most of the leases are plain old
    PCs, but there are a couple that show up as RAS under the "unique ID" field
    and the "Name" field matches that of another...this means that the person
    showing up as RAS is connecting THROUGH the matched Name...correct? Is
    there any way in W2K DHCP to stop this? The access-controller works by
    source IP address, and the IP would be the same for both PCs and therefore
    allowed through to the internet. Thanks

    Jason D. Humes
     

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