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Network Security Focus-Microsoft
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RE: Shared drives through a firewall

Subject: RE: Shared drives through a firewall
Date: Tue, 17 Apr 2007 08:56:25 -0500
http://support.microsoft.com/kb/301673

HTH,
Tom

Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP -- Microsoft Firewalls (ISA)

 

-----Original Message-----
From: listbounce@securityfocus.com 
[mailto:listbounce@securityfocus.com] On Behalf Of Nicolas RUFF
Sent: Tuesday, April 17, 2007 3:54 AM
To: aeheald@gmail.com
Cc: focus-ms@securityfocus.com
Subject: Re: Shared drives through a firewall

I am trying to persuade a client NOT to map a drive through 
two firewalls to
an untrusted server in a DMZ to run an application. I've 
tried Googling
Netbios and security, but get so many entries as to be useless.
Other than the latency issues, and my ten cents that it 
seems to me to be an
enormously foolish idea, can you folks offer me any further 
ammunition?

Here is your silver bullet: it won't work :)

The SMB+NetBIOS+TCP/139 protocol is not NAT aware.

So unless your client is using public IP addresses internally, it will
just fail.

Regards,
- Nicolas RUFF




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