RE: Blocking Access to Non-domain computers

["DeGennaro, Gregory" <Gregory_DeGennaro () csaa com>]

You can use MAC filtering, however if you are really paranoid, you
should use a CA server which can be extended to the network level using
802.1x.  If you are not using Active Directory, you may want to migrate
to AD and if you are paranoid, upgrade to Windows 2003 server and XP
professional and take advantage of Ipsec Policy.

http://www.microsoft.com/resources/documentation/WindowsServ/2003/all/de
ployguide/en-us/Default.asp?url=/resources/documentation/WindowsServ/200
3/all/deployguide/en-us/dnsbj_ips_overview.asp

It seems to work really nice and have heard many good things about ipsec
policy.  Of course, if you encrypt traffic and you use a NIDS, you will
need to have man-in-middle devices to unencrypt and sniff the packets
and re-encrypt or you will need a HIDS on all devices.

Regards,
 
Greg DeGennaro Jr., CISSP, CCNP
Systems Engineer


-----Original Message-----
From: Andreas [mailto:andreas () inferno nadir org] 
Sent: Monday, August 23, 2004 12:16 PM
To: security-basics () securityfocus com
Subject: Re: Blocking Access to Non-domain computers


Hello,

On Thursday 19 August 2004 16:58, Brian Gehrke wrote:
> I am running a W2K domain, using DHCP.  Is it possible to block 
> non-domain computers from getting an IP address from the DHCP server, 
> so they will not be able to access the Internet through the network.

is dhcp by mac address (which of course can easily be spoofed) 
an option?

regards,
andreas

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