RE: Network Segregation to prevent spread of malware

[Grzegorz Dlugajczyk <dlugajczyk.grzegorz () hotmail com>]

Hi there, 

You can avoid Malware spreading from one network segment to another by using the following approach:
- remotely accessing a separate user environment such as another desktop stored in a less trusted or more isolated area 
of the network from which users can access the web. It can be implemented by using Citrix to directly access separate 
user environments
- remotely accessing an application directly from the internal network. The remote application runs in the less trusted 
environment, however, the user accesses it from their normal corporate desktop.

The key point with both options is that users do not store or process potentially malicious information directly from 
their corporate desktop. Each user provides input to the remote application or desktop and, if required, output is sent 
back to the user through a sufficiently structured and limited capability that prevents malware or potentially 
malicious content from executing or propagating throughout one network segment to another.
One of the important controls when implementing this type of segregation is to ensure that untrusted web browsing 
environments are non-persistent and regularly patched & fixed. That is, if the web browsing environment becomes 
compromised with malware, the infection is quickly removed when the user completes their web browsing session. 

Common examples of systems that enable this type of functionality include separate desktop & application virtualisation 
like Citrix XenApp, VMware ThinApp, Microsoft App-V, etc.

Regards,
Grzegorz

> Date: Tue, 22 Jan 2013 17:33:05 +0000
> From: tomright006 () gmail com
> To: security-basics () securityfocus com
> Subject: Network Segregation to prevent spread of malware
>
> Hello All,
>
> I need few tips on Network Segregation to prevent spread of Malware. Can I avoid Malware spreading from one network 
> segment to another just by segregating network with access list or firewalls?
>
>
> Thanks,
>
> Tom
>
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In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

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