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RE: block internet at two workstations
From: "Peter McLernon" <pcm () mclernon com>
Date: Wed, 7 May 2003 19:59:27 -0400

If the computers are Windows 2000, and the users are using IE I believe you
can set the local security policy to not allow internet access. You can do
this by going to the security policy, and change the settings for Internet
Explorer, telling it to access the web via a proxy server that doesn't
exist.

I have done it in my office via domain policy, on the local machine, but I
believe that you can still do it if the Box is part of a workgroup.

Peter McLernon

-----Original Message-----
From: Lucas Zaichkowsky [mailto:Lucas () dnsys com]
Sent: Wednesday, May 07, 2003 11:59 AM
To: Tim Laureska
Cc: security-basics
Subject: RE: block internet at two workstations


It looks like your router (Assuming it's firmware v1.1 or newer) only allows
you to block access to specific services, such as WWW.

You might want to just get a Linksys BEFSR11 or BEFSR41 and use that.
They're very inexpensive.  You can set up a MAC filter so that their network
card is rejected by the router.  Configure their TCP/IP manually, making
sure not to use an IP that the router is set up to hand out via DHCP.

-Lucas


-----Original Message-----
From: Tim Laureska [mailto:hometeam () goeaston net]
Sent: Tuesday, May 06, 2003 1:39 PM
To: 'Mark Kelsay'
Cc: security-basics
Subject: RE: block internet at two workstations


I hope this isn't a repeat message... my outlook is acting up...

Yeah, the netgear box is set up for DHCP... If I set static IPs, I don't
want a smart network user to be able to reset the default gateway

My ISP guys said:
Most routers will allow you to filter by Mac address. i.e. Use winipcfg
or ipconfig to get the Mac address of the network card in the work
stations you wish to block. Then add them into the filtered list. This
will allow them the freedom of the inside network but will not be able
to surf outside.

That sounds good.  Not sure if the netgear FVS 318 will do that though

-----Original Message-----
From: Mark Kelsay [mailto:MKelsay () switchboard com]
Sent: Tuesday, May 06, 2003 2:17 PM
To: 'Tim Laureska'
Subject: RE: block internet at two workstations

Oh its there.  I would think the netgear is dolling out dhcp info to the
workstations.  setup the workstations in question with static settings
and
omit the default gateway entry.


Mark

-----Original Message-----
From: Tim Laureska [mailto:hometeam () goeaston net]
Sent: Tuesday, May 06, 2003 2:27 PM
To: 'Mark Kelsay'
Subject: RE: block internet at two workstations


With the ISP I'm using and the netgear FVS 318 box, I don't need a
default gateway entered at all on the stations

-----Original Message-----
From: Mark Kelsay [mailto:MKelsay () switchboard com]
Sent: Tuesday, May 06, 2003 2:10 PM
To: 'Tim Laureska'
Subject: RE: block internet at two workstations

remove the default gateway entry on the workstations TCP/IP settings.


Mark

-----Original Message-----
From: Tim Laureska [mailto:hometeam () goeaston net]
Sent: Tuesday, May 06, 2003 7:01 AM
To: security-basics
Subject: block internet at two workstations


I'm working with a small (10 user network) with a netgear FVS318
firewall, accessing the internet via cable modem.. The client wants to
block internet access at two workstations.  I don't see anything
available within the firewall documentation/configuration that would
address this.  What is the best and easiest way to do this ...easy and
best may be a contradiction :-)

TIA
Tim




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FastTrain has your solution for a great CISSP Boot Camp. The industry's most
recognized corporate security certification track, provides a comprehensive
prospectus based upon the core principle concepts of security. This ALL
INCLUSIVE curriculum utilizes lectures, case studies and true hands-on
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