RE: Firewall and DMZ

["David Gillett" <gillettdavid () fhda edu>]

  The problem with this is that there's almost always a 
need to provide (some) LAN users with access to servers 
in the DMZ, such as to maintain content.
  To avoid exposing that traffic, or the necessary 
firewall holes, to the Internet, you need to add a 
third firewall between the LAN and DMZ.

  Explaining to management why you need three boxes 
where one can do the job is left as a career-limiting
exercise.

David Gillett


> -----Original Message-----
> From: Aaron Fisher [mailto:aaron-fisher () iinet net au]
> Sent: June 11, 2003 23:38
> To: security-basics () securityfocus com
> Subject: RE:Firewall and DMZ
>
>
> After seeing this topic go on for some time why not have a 
> router with 2 
> network interfaces one interface you would have your firewall 
> and then 
> internal LAN
>
>                                 <> Firewall <> LAN
>  internet <> router
>                                 <> Firewall <> DMZ
>
> The other would have your firewall and then DMZ. You can then 
> deny all 
> traffic with a source add from the DMZ going to a dest of 
> your LAN. This 
> still wouldnt stop traffic originally coming from the LAN as 
> im assuming 
> you would be using NAT so the source address would be the routers 
> external interface and it was initiated by the LAN. Hopefully this 
> sugestion makes sense however routers with 2 10/100 network 
> ports can be 
> rather expensive.
>
> Anyways thats my 2cents
>
> Aaron
>
>
>
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The Gartner Group just put Neoteris in the top of its Magic Quadrant,
while InStat has confirmed Neoteris as the leader in marketshare.
     
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Visit us at: http://www.neoteris.com/promos/sf-6-9.htm
----------------------------------------------------------------------------