Great Circle Associates Firewalls
(April 1997)
 

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Subject: [CyberGuard] these configuration're possible in NAT?
From: Young-jin Hong <wits @ nuri . net>
Organization: Inet Inc.
Date: Tue, 08 Apr 1997 16:23:44 +0900
To: firewalls @ GreatCircle . COM
Cc: wits @ nuri . net

Dear readers and experts.

Origianally, my company use two B class network address(official) for
our internal network without NAT. But as we're configuring our
Firewall(CyberGuard Firewall), we like to use NAT with a C class
network address to connect with Internet while hiding our conventional
B class addresses for internal use.

  Ex)  C class network address :  203.255.111.0
       (for internet connection)

       B class network address :  172.16.0.0
                                  172.17.0.0

       in NAT configuration:

       Type       Global address   Internal     Mask
       --------   -------------    ----------   -----------
       network    203.255.111.0    172.16.0.0   255.255.0.0
       network    203.255.111.0    172.17.0.0   255.255.0.0

are these NAT configuration possible?

Young-jin Hong
E-mail> wits @
 nuri .
 net

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