Great Circle Associates Firewalls
(April 1995)
 

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Subject: Re: Internet Security/Firewalls and Windoze/NT
From: rmck @ sandfiddler . paragon-systems . com (Bob McKisson)
Date: Tue, 18 Apr 1995 17:11:51 -0400
To: scott @ disclosure . com, mikenel @ netcom . com
Cc: firewalls @ greatcircle . com

> > Unfortunatly, one of the systems I have to support is a Windoze/NT
> > (allegedly) Advanced Server system (no, I am not an NT or M$ fan and you
> > can flame me in private email, if you dare).  This box has to be
> > accessible to the net along side a Sun box.
> > 
> > 1) Has anyone done this?
> > 2) What are the internet security concerns when it comes to NT?
> > 3) They (I take no responsibility for this decision) want this thing
> > set up on the "friendly" side of the firewall (friendly in that I
> > haven't kicked it in its side, yet! :-).  What are the issues in
> > setting up a firewall in front of an NT box?
> 
> 1. Don't use the FTP server unless you really have to. It is kind of
> tricky to make it completely secure.
> 
> 2. Block 137/udp and 139/tcp -- these are the NetBIOS IP ports (file 
> sharing, printer sharing, etc...).
> 
> These are two I can think of off the top of my head. . .

You guys also might want to check out the action at Blue Ridge
Software.  Word has it that they are very close to a C2 ticket from
NCSC for their version of TNT (Trusted NT).

rmck

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Next: SLIP past the firewall?
From: Ed Strong <ems @ CS . Princeton . EDU>
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