Shouldn't be problem,

Set your network object NAT's hide to IP(FW)
Set your mailserver object NAT's static to your ExternalIP (as referred by
DNS as MX record)
Don't forget to add a route to your mailserver.(FW-1 is not a router, you
still have to do that in NT or Unix)
Add rules allowing in/outbound messages preferably with a resource and virus
scanning...

Good luck

-----------------  FROM : ---------------
Michel Toussaint,MCSE
System Administrator
Eonic Systems NV
Mailto:[EMAIL PROTECTED]
Vcard http://www.eonic.com/vcards/mto.vcf
- From Deep Space To Deep Sea -
Web site: http://www.eonic.com
-----------------------------------------



-----Original Message-----
From: Filippo Dello [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 06, 2000 4:14 PM
To: '[EMAIL PROTECTED]'
Subject: [FW1] problems with exchange begind firewall using Address
translation



Is there anyone out there who has had experience with Exchange running
behind a firewall and using address translation. 
Im having a problem whereby i can get the whole network to go through the
firewall as a hidden external IP but i cant set a static ip for the exchange
server.


Thanks in advance


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