Great Circle Associates Firewalls
(July 1997)
 

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Subject: Changing IP addresses behind a FW
From: "Robert Thompson" <thompsrj @ hotmail . com>
Date: Wed, 09 Jul 1997 10:59:01 PDT
To: fw-1-mailinglist @ us . checkpoint . com;, firewalls @ GreatCircle . COM
Cc: thompsrj @ hotmail . com

Greetings,

We are getting ready to implement the Sun FW-1 v3.0 and the discussion 
has come up concerning whether there is any benefit to changing the IP 
addresses behind the fw.  My thought is that since the infrastructure IP 
addresses have been known to the public, this would allow PING, UDP, 
RCP, ICMP services as possible entry points for an attacker, esp. 
knowing the IP addresses.

Am I way off base here?  Your thoughts are appreciated.


TIA,

Robb

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