Great Circle Associates Firewalls
(July 1996)
 

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Subject: Re: Firewalls-Digest V5 #393
From: Boni Bruno - Director of Internet Services & Security <bbruno @ dswnet . com>
Organization: Data Systems West
Date: Fri, 05 Jul 1996 10:43:40 -0700
To: Firewalls @ GreatCircle . COM
Cc: mbai @ straticom . com
References: <199606271821 . LAA25335 @ miles . greatcircle . com>

> Date: Thu, 27 Jun 1996 09:06:16 -0400
> From: Mario Bai <mbai @
 straticom .
 com>
> Subject: Re: IP address for Enterprises use
> 
> >Robert Bonomi wrote:
> > + Dear All,
> > +
> > + Who can tell me where I can find the RFC document about Enterprises IP address.
> > +
> > + In order to avoid conflicting with Internet IP address. Our Company will use some IP address 
matching RFC definition.
> > +
> > + If anybody know the solution, please let me know where I can get such document.
> > +
> >
> > use the class A address 10.0.0.0  netmask 255.0.0.0   this is safe.
> 
> What is the potential problems introduced when using "bogus" or reserved
> IP address behind a firewall/proxy server? I know that the proxy server
> should translate all internal IP addresses and only present its own IP
> address to the Internet (or receiving server), but if you have
> implemented solely an HTTP proxy server and sophisticated IP filtering
> on a Cisco router, what are the potential problems that could arise? Are
> there any circumstances where the internal IP address would "leak" out
> onto the Internet and cause problems?
> 
> tia,
You can find RFC 1918 at http://andrew2.andrew.cmu.edu/rfc/rfc1918.html,
which obsoletes RFC 1627, 1597 on address allocation for private internets.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Boni D. Bruno, Director of Internet Services - x225	     818-883-9800
							    (FAX)883-4604

Data Systems West
21101 Oxnard Street		          		bbruno @
 dswnet .
 com
Woodland Hills, CA 91367			    http://www.dswnet.com	
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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