Home page logo
/

basics logo Security Basics mailing list archives

RE: block internet at two workstations - Answer
From: jamesworld () intelligencia com
Date: Thu, 08 May 2003 11:49:20 -0500

Tim,

IF  (BIG IF) those machines have no need for IP services:

Since it's a small user network 10 machines:

Remove TCP/IP on those 2 machines and add netbuei.

Add netbuei to the other machines (so they can all talk).

The 2 w/o TCP/IP will not be able to get tot he internet.

You could use IPX if you really wanted to too.... Chatty though and more overhead.


very simple and you can rest assured that the Netbuei machines will not get out to the internet.

Make sure you have a way to distribute the AV updates to those machines (script on an IP machine to push the files to a share)

Then you can lock down the ability to add protocols


If they need IP:

add a secondary IP network to all machines

192.168.0.1 = fw and all are on 192.168.0.x
add 172.16.1.x to all machines as secondaries.
Remove 192.168.0.x from the 2 machines.

They can communicate via network since they are all local.
If you need to go to another remote site then you are looking at adding IP secondaries to your router.

172.16.1.x has no route to the Internet


Either way, problem solved.


-James


At 20:21 5/6/2003, Tim Laureska wrote:
I called Netgear and they said that feature is not available in any of
their routers... I couldn't find any reference to deny rules or
filtering IPs or MAC addresses in the documentation either


From: tombin [mailto:tomb1n () attbi com]
Sent: Tuesday, May 06, 2003 9:11 AM
To: Tim Laureska
Subject: Re: block internet at two workstations


Those netgear cable sharing routers, have the ability to block MAC
addresses. Just add the 2 machine's MAC addresses into the firewall
rules to deny. Check the help file located on the router for a better
description of how to do this.

Tim Laureska wrote:

>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
>
>
>




---------------------------------------------------------------------------
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 utilization of pertinent security tools. For a limited time you can enter for a chance to win one of the latest technological innovations, the SEGWAY HT. Log onto http://www.securityfocus.com/FastTrain-security-basics ----------------------------------------------------------------------------


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault