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RE: Internal POP3 users
From: "David Gillett" <gillettdavid () fhda edu>
Date: Wed, 3 Mar 2004 10:13:16 -0800

  Why is it "a major security concern"?  Are you supposed to be
providing them with connectivity, or not?  If you are, DHCP 
service is kind of the least you can do.
  Do you have resources that you want to protect, that are not
adequately protected by your domain authorizations?  What kind
of resources are they?

  If you want to keep them off of the segment where your domain
is, then yes, you need to put them on a separate segment and
implement some kind of policy enforcement where the segments
meet.  If you're trying to restrict what they can do with the
bandwidth you provide them, that's a different problem with a 
different set of answers.

  And what does this have to do with POP3?

David Gillett

-----Original Message-----
From: Christopher Herrmann [mailto:CHerrmann () oddfellows com au]
Sent: Tuesday, March 02, 2004 5:01 PM
To: Security-Basics (E-mail)
Subject: Internal POP3 users


I have a number of users sharing our Internet connection who do not
authenticate to my NT network (they are to all intents and purposes,
different companies in the same building). However they all 
use the same
DHCP service (from my NT server).  This is a major security 
concern. What
are some of the ways I might separate the traffic generated on their
machines from my main network?
I understand segmentation is one option, but how do I 
distinguish between
those machines? Should I move the DHCP to the router for instance?

Any ideas would be welcome.

Christopher Herrmann
IT Manager

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